Some 80,000 Delft Blue tiles line the inside of this Amsterdam walkway.

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

The remains of the medieval wall that once surrounded Paris with ties to the construction of the Louvre.

Order a boozy baba au rhum at the oldest patisserie in Paris.

A short distance from the Eiffel Tower is the final resting place of several of the city’s more well-known and interesting characters.

The ruins of a Duke's bucolic dream, where camels once roamed alongside "Dutch" windmills and faux-Italian vineyards.

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

Medieval museum built over Roman baths that features famous tapestries of a lady and a unicorn.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

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

This legendary giant, born from vegetables, terrorized townspeople and cheated local children in games.

The legendary giant's severed hand sits on Antwerp's popular shopping street.

A man throwing a giant severed hand towers over Antwerp’s main square.

Most prolific publishing house in the 1600s open to the public.

An open-air sewer system that was covered piece-by-piece over 300 years.

This wildlife refuge is home to more than 200 species of birds, as well as monkeys, lizards, and other wildlife.

In Costa Rica's cloud forest, the roots of a woody ficus create a botanical bridge.

These mysterious ancient stone spheres were created by a civilization lost to time and are now mostly lawn ornaments.

It would take you approximately an hour and a half to walk to the end of Mexico's largest pier.

The city of Halifax still bears the scars of the largest explosion prior to the atomic bomb.

A memorial for public executions that dates back to the 14th century.

On the eve of a condemned prisoner's death, this bell rang 12 times outside their cell.

Only a few pieces remain of the structure that carried people and goods across the Thames for some 600 years.

This macabre painting of a Shakespearean scene looks like something out of a nightmare.