A flooded Mexican cave that hides a river beneath the water.

Still standing despite its considerable slant, this tilted lighthouse has become a local symbol of resilience.

A small collection of iguana-infested ruins hides amid Cancún's bustling hotel zone.

Few of the many visitors to this resort town know of its hidden Maya ruins.

One of Mexico's least-visited archaeological sites is tucked away inside a theme park.

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

Collection dedicated to funeral rites, equipment, and mourning rituals of the Viennese.

These temples are among the oldest free-standing stone buildings in the world.

One of the largest Buddhist stupas in North America is built of concrete designed to last 1,000 years.

This iconic science fiction house still looks like something from the future.

This Chinese-style quartz sundial was saved in its final hour.

The final resting place of American icon Buffalo Bill, and a museum that aids in telling his tale.

A downtown park built on top of unclaimed graves.

Wall to wall taxidermy at Denver's oldest and most exotic steakhouse.

A Rocky Mountain city provides a happy ending for a pinto pony and his Brobdingnagian red chair.

The spot in the Mile-High City that's exactly 5,280 feet above sea level (at least for now).

A multiversal transit station located right below a highway interchange.

Overlooking the Colorado Convention Center is this giant sculpture made from thousands of triangles.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

The world's largest carnivore sanctuary is home to over 450 meat-eating rescues.

A focal point of in Denver’s skyline for over a century, inspired by a Venetian basilica.

At this Denver landmark, the meals are compulsory, the sopapillas are complimentary, and the insanity is everywhere.

In a small Japanese garden off a busy Denver street, a memorial to a brave, principled politician.

"All Mountains - All The Time."