The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

This hotel is an amazing example of the Escuela Tapatía de Arquitectura movement.

This dreamlike museum is filled with the works of an influential surrealist artist whose name you may have never heard.

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

Superstitious? Discover the witchy side of Mexico through its largest esoteric market.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

The land is full of geologic eye candy, such as otherworldly spires, mushroom-shaped hoodoos, and prehistoric fossils.

An outdoor urban gallery of large-scale artworks by the world's most influential street artists.

"Only the devil could play golf here."

The lowest point in North America is home to an undrinkable pool surrounded by fields of geometric salt flats.

Millions of years of oxidation make a drive down this winding Death Valley road surprisingly colorful.

A small sculpture garden that provides a microcosmic representation of California.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

The remains of an abandoned dinosaur theme park litter the woods just off the highway.

Medicinal spa created with the discharge from a geothermal energy plant.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

A kaleidoscopic warehouse-maze of handmade neon signs.

The neon signs from Las Vegas' past find their final resting place at this unusual graveyard.

Brightly colored 30-foot-tall totems light up the desert sky just outside Las Vegas.

Just outside of Nairobi lies a large estate surrounded by endangered Rothschild giraffes, who have been fed from the window by Mick Jagger and Walter Cronkite.

Mexico's largest collection of masks is found in the ruins of an abandoned convent.

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

Every equinox this Maya pyramid puts on a spooky ancient light show.