The legendary wooden horse that stands in modern Troy is a prop from the 2004 Wolfgang Petersen film.

A tiny park in the middle of some big power politics.

This crumbling medieval basilica once attracted pilgrims by the thousands to collect a miraculous dust that formed above the saint's tomb.

This cave system allegedly holds the "metallic library" of a lost ancient civilization.

A subterranean playground in an abandoned slate mine.

The World's First 24 Hour Coin-Operated Art Gallery!! Plastic, Styrofoam, and Elvis--If you can't get rid of it, you might as well worship it!!

A sculpture of a salmon swimming through a brick building.

This abandoned boat sits on a nude beach, is shaped like a UFO, and is covered in graffiti.

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

Remains of Roman amphitheater hidden in a sleepy quarter of Paris.

The other side is actually green.

Sip cherry liqueur at a bar dating back to 1840.

Take a dip in the world's largest mineral hot springs pool.

A castle from the Holy Roman Empire that hosts traveling youth... in its stables.

This castle was once considered as an option for the Royal Family's alternate residence, but you may know it better from the 'X-Men' movie.

This medieval castle was reconstructed by Carlo Scarpa.

This former coal gasification plant found a curious second life as a popular public park.

Towering basalt columns, a creation of fire and ice.

Site of the greatest known waterfall that ever existed.

This ancient Roman aqueduct once funneled water to Diocletian's palace.

These Great Lakes sea caves accessible by boat in the summer turn into temples of ice reachable by foot in the winter.

Lyon's miniature version of the Eiffel Tower was built as a statement in support of French secularism.

Montmartre's sole surviving windmill became an iconic landmark for 19th-century painters, artists, and bohemians.

This enormous "cloth of the conquest" depicts the Norman invasion of England in mind-blowing detail.