Twelve grave-faced marble angels guard the emperor's tomb at Les Invalides.

A wealthy aristocratic family built this Disney-worthy, fairy-tale castle.

A spectacular Petrine Baroque summer palace commissioned for Catherine I by Peter the Great.

This soviet pilot's graveyard is filled with headstones made of airplane fins.

Legend says lovers who hold hands while venturing along this stone jetty and kiss at the end will remain together forever.

An empty relic of the Moscow Olympics crumbles away in Estonia's capital.

A spiral staircase twists to the top of this unusual Czech lookout tower.

Thirty creepy ghosts now inhabit this decaying 14th-century church.

This no man's land slicing through the island is strewn with abandoned relics of another time.

The ruins of a fairytale castle with a tumultuous history stand high atop the mountains.

Breathtaking Byzantine paintings cover the inside of this 12th-century church.

An unfinished complex built for children from around the world sits abandoned on the Black Sea coastline.

A Bulgarian monument to Russia's role in World War II is constantly being painted in pop culture protest.

An architectural marvel that spans the Arda River, and has stories of a haunted past.

There's a mini version of Iguazu Falls hidden in the Balkans, and it's got a rope swing.

Bridge that died in war and was resurected.

A massive, gleaming sea turtle with a rider atop its shell looks out over the horizon.

The Belgian library displays burned books that were salvaged from the fires of both world wars.

A maze of crosses marks the jumbled divide between the Netherlands and Belgium.

One Portuguese poet described this cape, the westernmost point in mainland Europe, as "where the land ends and the sea begins."

This castle has links to Portugal’s founding and struggles for independence.

In Portugal, a secluded stretch of untouched natural beauty hides at the bottom of a steep hill.

Perhaps the most spectacular grotto along the Algarve coastline.

A submerged village appears when dam levels drop.