The last occupied troglodyte dwellings in England weren't abandoned until the 1960s.

This pub can leave even the sober feeling slightly unsteady.

This charming railway is one of the oldest and steepest funiculars in England.

This bridge is the first to be made entirely from iron, but designed like it was still made of wood.

A giant gleaming memorial named for a coal miner who gave his life to the pits.

A Volkswagen Beetle decorated with millions of beads connects Mexico's past and future.

This foreboding building was the headquarters of the terrifying Spanish Inquisition in Mexico.

Many people don't realize there’s a lot going on in—and below—the world’s tallest triumphal arch.

This incredible college library is a visual masterpiece of mosaic art. It also looks kind of like a giant boombox.

The burial place of some of Mexico's most prominent residents is full of macabre stories and hidden masonic symbols.

These haunting ruins of a 700-year-old Prehispanic city have witnessed centuries of wars and massacres.

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

An island filled with hundreds of hanging, decomposing, decapitated dolls.

While you wait to cross the street at a traffic light in Mainz, you might notice that the light is staring back at you.

A distinctive former power plant turned university lecture hall looks like it could make you breakfast.

A famed artist's inspiring work of peace and tolerance.

Residing along a busy thoroughfare, this sculpture urges passersby to consider the future.

This tremendous timepiece was once the largest cuckoo clock in the world.

The last Tsar of Russia constructed this private church just so he could attend services when visiting his wife's hometown.

The final resting place of the famed German pilot, the "Red Baron."

This German fountain of a legendary apple wine-loving drink thief will spit on you.

This futuristic German television spire is actually the world's largest digital clock.

Fantastic views and thousands of love locks.

From Nazi chemicals to the CIA, this architectural marvel has played a fascinating role in German history.