Aldora Divers
Downtown Cozumel operator running six-diver boats on high-pressure steel tanks, with gear set up before divers board and cleaned after.
Also known as: Colombia Bricks, Columbia Bricks, Palancar Ladrillos
The southern end of Palancar Reef off Cozumel, where coral towers stand over white sand and a scattered brick cargo lies where the dive begins.
Last updated August 2026
Red brick lies scattered on white sand at the start of the dive, with an anchor in among it. Whether your group swims over the pile is settled on the morning. They lie on the flats at the point where the reef breaks, and the guides know the spot. Garden eels stand out of the same sand on the channel side, dropping back into their holes as the group comes past.
The coral arrives in two steps. First a short wall, ten to fifteen metres tall and close inshore, with a second stretch of open sand beyond it. Then the main structure, which starts at around fourteen metres and runs down to sand at twenty-seven. The coral comes as separate towers, not as one face, tall formations with sand slopes falling away between them into blue water, so you cross the gaps instead of tracking an edge.
Early on there is a passage through the pinnacles, narrow and close to vertical. Not every guide takes a group into it, and there is no need to go. Everything beyond it is also reachable around the outside. Past that the site turns and starts behaving like a wall, cut with recesses and hung with more towers, and most boats bottom out at about twenty-four metres along it. The light is still clean down there and the sand throws it back up under the coral. Two or three more passages come up towards the end of the dive if time and gas allow.
The finish is a climb onto the reef crest at six to nine metres, with the safety stop above it and open sand underneath.
Ask for this dive by the other name and you will still get it. The same ground is sold as Palancar Bricks and as Columbia Bricks, because it sits on the seam where one reef stops and the next starts. There is a break in the coral there, a run of clean sand between the last of Palancar and the first of the Colombia reefs, and the bricks lie in the break. In Spanish it is Palancar Ladrillos, which is the name the park itself uses1 and the one to say to a Spanish-speaking guide.
The park files it south as well as naming it. Reefs are closed here in blocks to let the coral recover, and Ladrillos is closed with the three Colombia reefs rather than with the rest of Palancar2. Divers get to the same place from the water. More than one regular writes this dive into a logbook under Colombia and then lists four Palancar dives with no Bricks among them.
Not everyone gives it a name at all. Some shops here sell Palancar as one dive with no sections, and one publishes a detailed model of the reef, point by point from north to south, with no Bricks anywhere in it. One of the island's long-serving guides holds that the bricks mark a spot on the sand and not a reef of its own. What nobody disputes is the ground. There is a brick field down there with anchors in it, and everyone who dives it surfaces talking about the same white sand and the same coral towers.
Divers who come back to Cozumel year after year are unusually consistent about the dive itself. They call it a favourite deep dive and describe it as the island's deep dives folded into one, with passages and pinnacles and a stretch of wall inside a single drift, the bottom at around twenty-four metres, and enough light left at that depth to photograph in.
Nobody has matched the bricks to a ship. The account you will hear on the boat is a barge that capsized in the 1950s and spilled a cargo of red brick onto the sand. No evidence has ever been produced for it.
A diver living on the island, who has photographed what is down there, gives an older version. Three anchors, he says, one of them lifted in 1967 and now standing in the shallows in front of Chankanaab. Coins salvaged many years ago that put the ship somewhere after 1870. A boiler that Hurricane Wilma uncovered in 2005 and the sand has since covered over again. A hundred metres or so towards the wall, another anchor lies almost completely buried with only its ring showing.
The two versions cannot both be right. A boiler means a steam vessel and coins after 1870 mean the nineteenth century, so neither belongs to a barge from the 1950s, and an anchor recovered in 1967 sits badly with a 1950s wreck as well. Two more accounts circulate among divers, one making it an eighteenth-century Spanish ship carrying brick for a road, the other making the brick ballast dumped off a ship and not a cargo it lost.
What survives all four versions is the brick itself. Divers still lift pieces off the sand and lay them out to spell words for a camera before putting them back, which is the one part of this site's story that is not in dispute.
The rest window here falls in late summer. Reefs in this park are closed in blocks so the coral can recover, and this section closes in August and September with the three Colombia reefs and with Palancar Caves2. Every published year since 2020 has followed that pattern3, which is worth planning around and is not a promise. Gardens and Horseshoe are rested in spring instead, so the reef is never shut all at once. No government page carries the year's cycle, so ask your dive shop which reefs are resting for your dates.
Ask for the dive by name and expect a different name back. Ladrillos to a Spanish-speaking guide, Bricks or Columbia Bricks in English, and it is worth confirming on the boat that the site being dived is the one you booked.
The bricks are not on every route. They lie on the sand at the start of the dive, and whether the group passes over them is decided by the mooring and the current on the day, so say you want to see them before you get in the water rather than pointing at the sand afterwards.
Look and put it back. Taking anything out of this park is prohibited, and gloves and knives cannot go in the water anywhere inside it. Both matter more here than on most dives, because the name invites people to pick something up, and bricks have gone home in luggage over the years.
The last thing to settle is the wall. Held inside the pinnacle field, with sand under the group at twenty-four metres, this is an ordinary Cozumel drift; out over the outer edge, with nothing below, it is a different dive on the same booking. Agree which one you are doing in the briefing, and leave the narrow passage near the start to the guide, who may decline it and is entitled to.
What makes this dive site stand out.
Scattered brick and an anchor on the flats where the dive starts, off a ship nobody has named
The last of the reef's four sections, where Palancar gives way to the Colombia reefs
A short inshore wall first, then the main structure down to sand at about 27 m
Divers file the same ground under Palancar or under Colombia; the park writes it Ladrillos
White sand between the towers, with garden eels in the flats and stingrays lying out on them
20.3204°N, 87.0275°W
Summary
Moderate for the depth and for a drift with no single edge to hold. The current carries you across open sand from one tower to the next, so you hold your own position and the reef will not hold it for you, and a diver who breathes heavily at 24 m will end the dive first.
Safety considerations
What can go wrong here, and what divers do about it. Conditions change - take the briefing from the operator on the day.
Book a guided dive at this site.
Downtown Cozumel operator running six-diver boats on high-pressure steel tanks, with gear set up before divers board and cleaned after.

Beachfront hotel-and-dive-shop resort on Cozumel's south road, boat trips to Palancar and Santa Rosa reefs plus house-reef night dives from its own dock.
Cozumel centre on the Casa del Mar dive dock in the southern hotel strip, where divers pick the sites, with a house reef off the end of its own pier.

SSI-affiliated small-boat operator near Cozumel's Ferry Pier since 1995, reviewers crediting named instructors for patient, safety-first guiding.
Owner run PADI 5 Star IDC Resort in downtown Cozumel, guiding every dive with an instructor at one per six divers, on two boats the shop owns.

Downtown Cozumel dive shop with dual PADI/SSI courses, small boats capped at six divers, and a long-serving divemaster reviewers ask for by name.
PADI 5 Star dive centre at Marina Cozumel running four-diver boat groups with 70-minute dives and hotel dock pickup.

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Parque Nacional Arrecifes de Cozumel
Palancar lies in the park's low-intensity use zone, where the ratio is eight divers per guide by day. Every dive runs under an authorised guide, who is required to check a diver's buoyancy before a reef dive. Sport diving anywhere in the park is capped at 45 m. Boats use mooring buoys and anchoring is prohibited. Divers stay 1.5 m off the coral, and touching it, standing on it and stirring sediment over it are all prohibited, as are gloves and knives. Removing anything from the park is prohibited, which covers the bricks, and so is feeding, chasing or disturbing any animal, with those sheltering in their holes named specifically. Reef complexes are closed in rotation to let the coral recover. Diving inside the park carries a federal duty, charged per person per day. Your operator adds it to the bill and gives you the wristband.
Both names are in daily use on the island for the same piece of reef. The dive sits on the seam where Palancar ends and the Colombia reefs begin, in a break of clean sand between the two, so divers file it on whichever side of the break they think of it as belonging to. The park's own name for it is Palancar Ladrillos, which is what to say to a Spanish-speaking guide. If you book Columbia Bricks and get on a boat where the guide calls it Ladrillos, you have booked the right dive.
Red brick lies scattered across the sand at the start of the dive, along with at least two anchors, and no one has matched it to a ship. Most boats tell you it came off a barge that capsized in the 1950s. A resident diver who has photographed the site describes something older: coins salvaged years ago that put the wreck after 1870, an anchor lifted in 1967 that now stands in the shallows at Chankanaab, and a boiler that Hurricane Wilma uncovered in 2005. Steam boilers and 1870s coins do not belong to a 1950s barge, so at least one of the two stories is wrong, and possibly both. Either way this is not a wreck dive. What you see is a scatter on open sand, not a hull.
August and September, in the pattern the park has kept since 2020. Reefs here are closed in blocks so the coral can recover from disease, and this section goes into the block with the three Colombia reefs and Palancar Caves, and not with the rest of Palancar. Gardens and Horseshoe rest in spring instead, so some of Palancar is always open. The year's cycle appears on no government page, and each block is announced as it starts, so put the question to the shop before you commit a trip to this section.
Most of this dive happens between 18 and 24 m, with the sand under the coral towers at 27 m and the reef top at 6 to 9 m for the safety stop. Shallower plans exist, and a shop can run this site at 12 to 18 m over the inshore structure if you ask before the boat leaves. Below the outer edge the wall keeps going past anything a recreational diver plans for, so the figure that matters is the one agreed in the briefing, not the one printed on a website.
Most boats here ask for one and it matches the 27 m plan, but it is a shop rule and the shops do not agree: the same site is graded from novice to advanced across the island, and park law sets no certification level for divers at all. An instructor asked which Cozumel sites suit a nervous new diver put it as a boundary and not a card, that most of Bricks works as long as the group stays off the wall. That is the honest test. Inside the pinnacle field there is sand under you the whole way; out over the outer edge there is nothing.
Not on every dive. They lie on the sand at the start of the route and guides know the spot, but the drop point and the way the water is moving decide whether your group passes over them, and sand moves across the site from one storm to the next. Say on the boat that you want to see them, because there is nothing to be done about it once you are in the water. Divers who find them still lay pieces out on the sand to spell words for a camera.
The sand is where the animals are on this dive. Garden eels stand out of the flats on the channel side and drop back into their holes as you come past, southern stingrays lie out on the open bottom with a bar jack riding above them, and green morays and sleeping nurse sharks hold under the ledges down at the sand line. On the reef top, in the lettuce and finger coral, there are hamlets and small Spanish hogfish. Fish life is thinner here than on the inshore reefs off town, and the corals and sponges carry the dive.
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