A lake at the bottom of the ocean.

This old-school café is famous for serving coffee, chilaquiles, and the Cuban Revolution.

This incredible college library is a visual masterpiece of mosaic art. It also looks kind of like a giant boombox.

The singular ruins of a mysterious lost city.

At least seven hues of blue and turquoise make this freshwater lagoon unique.

Stained glass windows bathe this botanical garden in cosmic light.

The ruins of an ancient temple to the Aztec wind god discovered in the middle of a metro station.

This church, buried halfway in lava rock, is all that remains of a Mexican village destroyed by a volcano.

This strange sculpture of a menacing skull surrounded by sun rays was discovered at the foot of the Pyramid of the Sun.

A dark tunnel leads to a striking white crater that seems to be from another planet.

The meteor that sealed the fate of the dinosaurs landed at this site, one of the largest impact craters in the world.

The burial place of some of Mexico's most prominent residents is full of macabre stories and hidden masonic symbols.

The jewel of western Mexico's archaeological legacy is this tiered circular pyramid now covered in grass.

At a museum of everyday objects, it is the act of collecting that is really on display.

Two waterfalls flow down the cliff faces decorated with rare natural basalt columns.

A scientific repository of goiters, boils and other ailments throughout Mexican history.

A museum in the former home of Marxist revolutionary Leon Trotsky.

A 500-year-old series of tunnels long believed to be folkloric was uncovered beneath the streets of Puebla.

Gilded heaven for philatelists and architecture freaks, still in full working order despite sitting atop tremulous ground.

The largest cave shaft in the world is home to thousands of birds and popular with BASE jumpers.

This beautifully deceptive waterfall is something far different from what it appears to be.

Explore the atmospheric ruins of an abandoned convent in the dense forests of Mexico's first national park.

The winter home of millions of migrating monarch butterflies.

Visiting this cacophonous collection of vintage novelties is like stepping into the mind of a crazed toymaker.