One of the largest ossuaries in Spain is packed from floor to ceiling with bones.

This ancient Corinthian helmet is South Korea’s only national treasure of Western origin.

An Austrian house of bones filled with hundreds of intricately painted skulls.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

Right angles in the forests of Panama.

See and taste one of the oldest and rarest collections of Armagnacs in the world.

This Peruvian bone silo lined with hanging human skeletons and hundreds of skulls is topped with a remarkable Michelangelo replica.

This Scottish manor house is a lush relic from the life of a literary great.

On high feast days, the entire blue-glass front of this modern church opens up to reveal the small wooden church inside.

A statue that would be at home in Rome can instead be found in the heart of Norway's oldest city.

The small Scottish townhouse where the "Father of the National Parks" was born.

When new viceroys were elected, they passed through this arch to cement the title.

Fascinating exhibits of prehistoric and ancient artifacts displayed with a uniquely modern touch.

A 250-year-old timepiece-automaton adorned with golden mechanical birds, which still sing to this day.

Over two centuries old and counting, Madrid's massive botanical garden contains one of Europe's only desert environments.

This scenic fortress dates back at least 2,400 years to the time of Magna Graecia.

Spain's stunning solar energy plant.

An outsider folly near Madrid.

An ornate tower shows off a local artist's architectural flair.

An ancient tower built during Roman times as a lookout post still stands to this day.

Replica of Seville, Spains famous Giralda, a former minaret converted into a bell tower.

Stunning Roman aqueduct used for 1900 years and still standing.

Cliffside houses provide a spectacular view from their perch above the valley.