Tulum and Dos Ojos Turquoise Waters: Day trip from Cancun

Main attractions • Dos Ojos — Two Eyes — takes its name from two adjacent sinkholes connected by an underwater passage, visible from above as a pair of openings in the jungle floor; it is one of the entrances to what may be the longest underwater cave system in the world, stretching hundreds of kilometres beneath the Yucatán Peninsula • The snorkelling and diving conditions are among the best of any cenote in the region — extraordinary water clarity, submerged stalactites and stalagmites formed when the caves were above sea level during the last ice age, and a bat cave chamber accessible by swimming through a short dark passage • The two main pools offer different experiences — the smaller, more enclosed eye is darker and more cave-like; the larger is more open with better natural light and more comfortable for casual swimmers

Things to do • Snorkelling through the connected passages between the two eyes — the underwater visibility regularly exceeds 100 metres and the submerged limestone formations are unlike anything accessible at surface level • The bat cave — a dry chamber within the cave system reached by swimming through a short dark passage — houses thousands of bats roosting on the ceiling; a guide leads this section and it is one of the most memorable experiences the cenote system offers

What to eat • Facilities on-site are minimal — bring snacks and water from Cancún or Tulum; the nearest reliable food options are in the Tulum hotel zone or town, a short drive away

Main attractions • El Castillo — Tulum's defining structure, a temple-pyramid perched directly on the clifftop above the Caribbean; its position was functional as well as ceremonial, serving as a lighthouse to guide Maya canoes through a break in the offshore reef below • The Temple of the Frescoes preserves original Maya painted murals depicting the rain deity Chaac and the descending god — some of the best-preserved polychrome frescoes in the Maya world, visible through protective grilles on the exterior • The walled city enclosure gives Tulum a legibility rare among Maya sites — three landward walls and the sea cliff as the fourth defence create a coherent, walkable urban footprint whose logic is immediately readable from the entrance

Things to do • Descend to the beach below the cliff via the wooden staircase within the site — swimming is permitted and the view back up to El Castillo from the water, with turquoise Caribbean sea in the foreground, is the defining image of the Yucatán coast • Walk the full site perimeter along the clifftop path for uninterrupted sea views and a sense of Tulum's strategic position — the drop to the water below and the reef visible offshore make the defensive logic of the location immediately clear

What to eat • Eat before arriving or after leaving — food within the site is limited and overpriced; Tulum town's mercado serves excellent Yucatecan food at honest prices, and the hotel zone has everything from beachfront tacos to serious restaurants