A Spanish-style estate that has traded black ties for rock concerts.

Neo-cave art on the macro scale.

A massive Montreal stadium that has seen nothing but trouble since its inception.

Human ancestor’s 3.6 million year-old footprints.

The small cliffside monastery known as the Tiger's Nest is said to be the meditation site of an 8th-century Buddhist master.

This Himalayan airport provides one of the most difficult landings in the world.

The inspiration for the Patagonia Clothing logo, Cerro Fitz Roy turns pink at sunrise.

Buenos Aires' city of the dead contains some very famous remains, including Eva Perón.

Once the home of a hermetic monk, this cave now houses a small church.

A museum dedicated to a secret military hospital hidden beneath a castle in Budapest.

The resting place for anonymous victims of the Danube's dark waters.

A New Zealand communications tower stands as the tallest structure in the Southern Hemisphere.

These mammoth-yet-narrow crevasses in the Earth are perfect for taking an otherworldly swim.

The stones of this Incan wall complex fit together so well you couldn't fit a piece of paper between some of them.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

Standing in a state of "arrested decay," this ghost town allows for a detailed peek into Gold Rush life in an unusually harsh climate.

The century-old bell and clock tower at UC Berkeley is the third-tallest in the world, and has fossils.

A shape-shifting buy-sell-trade bookstore, born to Beatnik Era spirit.

A huge musical instrument played by the ocean.

Concrete strongholds stand guard over the Golden Gate.

Bohemian paradise covered in majestic forests.

This unusually shaped mountaintop tower looks like a UFO floating over the city.

Finnish lake, and scene of an infamous murder mystery.