Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

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

These medieval skyscrapers dominate the skyline of this small Tuscan town.

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

If a glacial river suddenly diving into a sheer chasm via a dramatic, multi-stage waterfall isn't peak Iceland, it's certainly close.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

Medicinal spa created with the discharge from a geothermal energy plant.

An eerie, existential museum dedicated to the author of "The Metamorphosis."

This Prague museum collects brutalist relics and memories from the country's former Soviet rule.

A beautifully eclectic mix of architectural styles.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

This massive collection of British military artifacts includes the heartbreaking personal letters of the men in the trenches of WWI.

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

The final resting place of the tragic king and queen of the Jazz Age is tucked away in a small Maryland graveyard.

The neon signs from Las Vegas' past find their final resting place at this unusual graveyard.

The "world's biggest dinosaur" once housed a creationist museum in its abdomen.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

Copenhagen's celebrated theme park and gardens.

One of the best collections of wax anatomical models in the world.

This statue was given to France by the United States to commemorate the centennial of the French Revolution.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

A Parisian cemetery where the elite and artistic are interred beneath an eccentric collection of tombs.

France's most famous cemetery, with some of its most curious tombs.

Go inside to really appreciate this 500-year-old technological masterpiece.