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

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

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

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

A uniquely robust and historic look at Mexico's omnipresent dance with Death.

Clap your hands at the base of the pyramid, and the song of a sacred Mayan bird will echo through the air.

Mexico City's largest market contains a Willy Wonka-esque wonderland.

The winter home of millions of migrating monarch butterflies.

An elaborate Mayan city shrouded in alien conspiracy revealed the tomb of Pacal the Great.

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

An ancient system of freshwater caves filled with animal bones, including that of species long-extinct.

These haunting ruins of a 700-year-old Prehispanic city have witnessed centuries of wars and massacres.

The only castle in North America to ever house European sovereigns.

This fantastical house shaped like a seashell brings aquatic design to architecture.

Underwater art project will double as a massive artificial coral reef to help regenerate the damaged ecosystem.

Diego Rivera's massive tiled fountain and failed infrastructure project.

A disquieting Aztec sculpture displays hundreds of stone skulls representing the victims of human sacrifice.

High atop a Mexican rainforest mountain, this ancient pyramid once drew pilgrims countries away.

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

A quirky and charming restaurant founded by artists.

An Aztec temple, the largest man-made pyramid in the world, sits buried in earth with a Spanish church set on top.

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

A church dedicated to the Mexican skeleton saint.

A magical sinkhole on the Yucatán Peninsula is adorned with mini waterfalls and hanging vines.