An imperial church bombed to ruins during WWII now stands as a jagged memorial.

A 12th-century fortress containing some of Berlin's oldest buildings.

The bunker where Hitler took his own life is hidden under this deliberately ordinary parking lot.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

These murals stand as reminders to the troubled history of this Northern Ireland city.

Northern Ireland's Brobdingnagian stepping stones.

A little sculpture with a large wardrobe.

Climb inside an iron crystal magnified 165 billion times its normal size.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

Spain's largest bullring offers a unique glimpse at architecture and history.

The final resting place of the great navigator, or maybe his brother.

The world's largest wooden structure.

This amazing example of Valencian Art Nouveau looks more like a cathedral than a public market.

The Midwestern United States' tribute to Michelangelo is a foam statue sprayed with gaudy gold paint.

One of the greatest boxers and humanitarians to ever live chose his hometown as his final resting place.

The largest cemetery in Louisville is the final resting place of Col. Sanders and Muhammad Ali.

The grave of the iconic Kentucky Fried Chicken mascot features a bust of the man behind the goatee.

This elaborate towering structure was once famed for its revolutionary height.

Yo, Adrian!

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

World's first "penitentiary," meant to be humane, drove men insane.