Isla Contoy

Contoy is what the coast looked like before the towers: an eight-kilometre sliver of dunes, palms and mangrove lagoons off the peninsula's northeastern tip, protected as a national park since 1998 and famously capped - only around two hundred visitors a day, licensed boats only, no overnight stays. The cap preserves a seabird metropolis: magnificent frigatebirds by the thousand inflate scarlet throats over the lagoons, brown pelicans squadron the shallows, double-crested cormorants crowd the mangrove roots, and boobies, terns and spoonbills rotate through a list topping 150 species, watched from an observation tower and short interpretive trails around the small research station. Tours run a standard, well-ordered day - a snorkel stop at Ixlache reef where the Caribbean meets Gulf currents, a naturalist walk, lunch under the palms and hours of empty-beach idleness on sand that sees no vendors. Sea turtles nest in summer; whale sharks pass offshore in season.

What you'll find

• The frigatebird colonies - scarlet-throated squadrons over the lagoon.
• The observation tower - the island's bird city from above.
• Ixlache reef - the mixing-current snorkel stop en route.
• The empty beach - protected sand at natural occupancy.

When to go

December to August for sea state; spring for nesting drama at its peak. Book a day or two ahead in high season - the visitor cap is real.

Before you go

The day is structured and boat-bound - independent exploring is limited by design. Bring reef-safe everything; rules are enforced. Frigate close-ups favor zoom lenses over hope.

Nearby

Isla Mujeres supplies the boats and the before-after beach; whale-shark grounds lie seasonal minutes north.

Key facts