🇲🇽 Mexico · Yucatán Peninsula
There is a place in the south of Quintana Roo where fresh water lays out a palette of blues that looks painted: Bacalar Lagoon, the famous 'Lagoon of Seven Colors'. Depending on the depth, the white sand bed, the sediment and the sunlight, the water goes from the pale, almost white turquoise of the shallows to the deep blue of the channels, a range that shifts with the hours of the day. Beside it, the town of Bacalar —quiet, colorful, with its old fort— looks out over that mirror of colors.
Bacalar is fresh water, not sea: the lagoon is fed by springs, cenotes and underground rivers, and it holds stromatolites, structures formed by microorganisms that are among the oldest life forms on the planet, true living fossils that have to be looked after when you swim. The town, named a Pueblo Mágico, keeps San Felipe Fort, built in the 18th century to fend off pirates, and holds a history reaching back to one of the oldest Maya cities, Chactemal.
This guide gives you the practical, real details: prices for the boat and sailboat tours around the lagoon (2025), admission to the cenotes and swimming spots (Cenote Azul, Cocalitos, Los Rápidos), how to get there from Tulum, Cancún or Chetumal —including the new Tren Maya— and advice on looking after the lagoon (biodegradable sunscreen or none at all, do not step on the stromatolites). Bacalar is for slowing down, sailing among colors and switching off from the busier Caribbean.
The Bacalar region was the cradle of one of the oldest Maya cities, Chactemal (or Chetumal), the center of a chiefdom that traded cacao, honey and other goods. The name Bacalar derives from the Maya 'Bakhalal' or 'Sian Ka'an Bakhalal', usually translated as 'place surrounded by reeds' or 'near the reeds'. It was one of the first places in the region subdued by the Spanish: in 1543 the town of Salamanca de Bacalar was founded on the Maya settlement. For centuries the town was exposed to attacks by English pirates and by the logwood cutters operating in nearby Belize, which led to the building, in the 18th century (finished around 1733), of San Felipe Fort, a fortress to defend the population. In the 19th century, during the Caste War, Bacalar was taken by the rebel Maya and remained under their control for much of that period. The lagoon, with its exceptional beauty and its stromatolites, turned the town into a nature destination that today holds the Pueblo Mágico designation. The full history is on our history page.
Read the full history ↓The Mexican Caribbean of white sand and turquoise water: Maya land of Tulum and Cobá, setting of the Caste War, birthplace of the great destination of Cancún and the Riviera Maya, and of the seven-color lagoon of Bacalar.
Read the history of Quintana Roo →No exact prices: a scale from $ (budget) to $$$$$ (luxury), with 2-3 options per category.
Origins, formation and what the sources say.
Before it was a town or a human story, Bacalar is an extraordinary lagoon. Bacalar Lagoon is a body of fresh water about 42 kilometers long, stretched north to south, formed in the karst of the Yucatán Peninsula: porous limestone terrain, crossed by underground rivers, cenotes and springs that feed the lagoon with filtered fresh water. It is not the sea: it has no waves and no ocean tides, and its connection to the Caribbean is indirect and limited.
The famous 'seven colors' are not down to pigments but to an optical effect. The bed of white sand and carbonate, combined with the lagoon's varying depths (which at some points form very deep cenotes) and with the sunlight, makes the water appear in a range of blues and turquoises: from the white-turquoise of the shallow edges to the deep blue of the channels and pools. That is why the colors blaze in sunshine and go flat on cloudy days.
But the most astonishing thing about Bacalar is its stromatolites. These are rocky structures formed by the activity of microorganisms, above all cyanobacteria, which trap sediment and precipitate carbonate, growing very slowly over time. Stromatolites are among the oldest life forms and ecosystems on the planet —their fossil equivalents date back billions of years— and those of Bacalar form one of the most important living colonies in the world. They are living fossils, extremely fragile, that must not be stepped on or touched: looking after them means looking after a record of the origin of life on Earth.
The Bacalar region has a deep Maya past. Nearby stood Chactemal (also written Chetumal or Chactemal), one of the oldest and most important Maya cities and chiefdoms in the south of the peninsula. This lordship controlled a rich territory and kept up intense trading activity: along its routes moved cacao (which worked as currency), honey, salt, feathers and other valuable goods of Mesoamerican commerce.
The name Bacalar derives from the Maya Bakhalal (or Sian Ka'an Bakhalal), usually translated as 'place surrounded by reeds' or 'near the reeds', referring to the vegetation on the lagoon's shores. The place name reflects how the Maya saw this landscape of water and rushes. The lagoon and its surroundings were part of the living environment of these communities.
Chactemal also went down in history for a singular episode from the early days of the conquest: that of the Spaniard Gonzalo Guerrero, a castaway who, like Jerónimo de Aguilar, fell into Maya hands but, unlike him, integrated fully into their society. According to the chronicles, Guerrero married a Maya woman of the Chactemal nobility, had children —considered among the first mestizos— and went on to fight on the Maya side against the Spanish. His figure is a symbol of mestizaje and of Indigenous resistance in the region.
Bacalar was one of the first places in what is now Quintana Roo to be subdued by the Spanish. In 1543, the conquistadors founded on the Maya settlement the town of Salamanca de Bacalar, which became an outpost of the Spanish presence in the south of the peninsula. Its position, however —relatively isolated and close to the Caribbean coast— exposed it for centuries to a constant danger: pirates.
Through the 17th and 18th centuries, the southern Caribbean was an area of activity for English pirates and privateers, as well as for the logwood cutters (a tree from which a valuable dye was extracted) who settled in what is now Belize. These groups attacked the town of Bacalar again and again, sacking it and putting its inhabitants in check. The situation got so bad that the population sometimes had to abandon the place.
To defend the town, the Spanish Crown ordered a fortress built: San Felipe Fort, a solid square fortification with bastions, a moat and cannon, finished around 1733. From its walls, looking out over the lagoon, attacks were watched for and driven off. The fort became the defensive heart of Bacalar and is today its most emblematic historic monument, home to a museum telling the story of piracy and of the region. The fort's existence is a reminder that this lagoon of placid water was, for centuries, a contested and dangerous frontier.
The 19th century brought Bacalar one of the most dramatic chapters in its history, tied to the great upheaval that shook the whole peninsula: the Caste War of Yucatán. From 1847 on, the Maya peoples rose in a long rebellion against the population of European and mestizo origin (the 'white Yucatecans'), in a bloody conflict that reshaped control of the territory for decades.
Bacalar, by its position in the south, ended up at the center of the dispute. The town was taken by the rebel Maya and, for much of the second half of the 19th century, remained under insurgent control, especially that of the 'cruzob' Maya, followers of the cult of the Talking Cross, who maintained an independent political and military organization in the eastern part of the peninsula. San Felipe Fort, once a defense against pirates, changed hands in the course of that fighting.
The Caste War and Maya control of the area kept Bacalar and the south of Quintana Roo in a state of isolation and conflict that lasted into the early 20th century, when the Mexican state reconquered the territory militarily. That history of Indigenous resistance left a deep mark on the region's identity. The territory of Quintana Roo, of which Bacalar is part, was only constituted as such in the 20th century, and the state was created in 1974.
For much of the 20th century, Bacalar remained a quiet, little-known town in the south of Quintana Roo, in the shadow of nearby Chetumal and far from the tourist boom of Cancún and the Riviera Maya. That quiet began to change in recent decades, when the exceptional beauty of the Lagoon of Seven Colors and the fame of its stromatolites drew travelers looking for a different kind of nature destination, calmer than the crowded Caribbean.
Recognition as a Pueblo Mágico pushed tourism further. Bacalar filled with boutique hotels, eco-lodges, cafes and operators offering boat, sailboat, kayak and paddleboard tours, and established itself as one of the fashionable destinations of southeastern Mexico. The arrival of the Tren Maya, with a station in the town, improved its connections and raised expectations of growth.
But that success came with a serious environmental concern. The lagoon is a closed, fragile ecosystem: growing tourism, building along its shores, wastewater, sunscreens and repellents, jet skis and people treading on the stromatolites all threaten its delicate balance. In recent episodes, heavy rain and the wash of sediment temporarily darkened the water, sounding the alarm about the lagoon's health. Bacalar now faces the challenge of conserving the natural treasure that made it famous —its colors and its ancient stromatolites— while it grows as a destination. Its future depends on that balance.