Unsurprisingly, Holland is home to one of the most magnificent flower gardens in the world.

This community on a small Venetian island has taken to painting their houses in bright neon hues.

This curious, round temple is the oldest still-standing marble building in Rome.

The yawning maw of this pagan visage is said to bite off the hands of liars.

Ancient ruins hidden underneath a modern luxury hotel.

Pilgrimage site for star-crossed lovers.

This medieval castle was reconstructed by Carlo Scarpa.

A grassy pyramid named after a French battle.

An expansive complex of subterranean tunnels is all that remains of one of Europe's most formidable medieval fortresses.

This Luxembourg cave is covered in cryptic looking marks left by mining activity.

In the heart of Luxembourg's "little Switzerland" weaves a breathtaking natural sandstone canyon with a mythological past.

This tri-part waterfall is a little bit of fairytale beauty in the heart of Luxembourg's Little Switzerland.

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

One of the best-preserved Roman amphitheaters is still used today, but for less brutal events.

Mountain where Jesus was first tempted by the Devil.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

An early 20th-century bullring converted into a modern shopping center.

This cemetery features modernist statues as strange as its name.

The cutest way to stay safe in traffic.

This still-celebrated home was a radical architectural experiment in 3D De Stijl.

Artistic tombs, monuments, and a beautiful "Hall of Fame" lurk inside this cemetery.

This ultra-modern wooden boardwalk turns the ocean into a swimming pool.

This sublime architectural marvel is a rare example of an expressionist church.

Two stone columns flank the grand Venice square, but there were supposed to be three.