When oil was discovered just outside of Pittsburgh, the city became home to this regional stock market.

A giant ball made from pieces of an old Jeep.

The largest university building in the West is a gothic masterpiece containing dozens of theme rooms based on different countries.

Situated on a sacred Inca site, this 16th-century cathedral took nearly 100 years to build.

Sleep in a glass pod dangling off a cliff.

This Peruvian canyon is filled with geometric salt pools that have been being harvested since the Incan empire.

A remote candy-striped mountain in the Peruvian Andes straight out of the pages of Dr. Seuss.

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

It's just another skyscraper, but it's shaped like '90s cell phone.

Towns with a resource known as "white gold," valuable enough to fight a war over, now stand ghostly and empty.

The hellish conditions of this abandoned mine that snakes beneath the Pacific Ocean gave it its diabolic name.

A fantastical and futuristic temple of light built from nine monumental glass veils.

A beautiful deserted greenhouse in the middle of a park.

The first public library in the Americas has more than 45,000 books dating back to the 15th century.

One of the world's largest murals covers a large swath of homes in its hillside neighborhood.

A lake at the bottom of the ocean.

This popular cave pool is truly magical, despite the crowds.

The enigmatic and seldom visited ruins of a Mayan city-state.

This church, buried halfway in lava rock, is all that remains of a Mexican village destroyed by a volcano.

The singular ruins of a mysterious lost city.

A 500-year-old series of tunnels long believed to be folkloric was uncovered beneath the streets of Puebla.

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

Extraordinary sculpture garden created by an eccentric English poet.

This futuristic building is yet another architectural wonder in Dubai.