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.

Where layer cakes tower above one’s head and there is never a shortage of icing.

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

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

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

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.

A quirky and charming restaurant founded by artists.

A high point in Vancouver kitsch.

An abandoned Victorian-era amusement park is rusting away amidst luxury houses.

A collection of human remains, animal body parts, and other macabre curiosities all legally for sale.

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

A snapshot of the city's fascinating voodoo culture.

Most-visited and most-photographed slot canyon in the American Southwest.

On the Oregon coast there is a natural hole that seems to be draining the sea.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

A collision of human error and natural geothermal pressure created this rainbow-colored geologic wonder.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

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

The famous artist couple lived and worked here, in two different houses separated by a bridge.

An ancient Viking village in North America that predates Columbus by 500 years.

The Victorian-era greenhouse is stuffed with tropical plants, and open 365 days a year.