The vast, legendary catacombs hold secrets much stranger than stacked bones.

"There's nothing there," and other lies the KGB told us.

Dedicated to the outnumbered Finnish forces who pushed back Soviet forces during the conflict.

This irregularly shaped sea fortress has defended not one but three different sovereign states.

Hungarian Jews were ghettoized during the Second World War, but little remains of the original wall that closed the Jewish people off from the rest of the city.

This easily overlooked memorial immortalizes the scars from the 1956 Hungarian Revolution.

A statue in Budapest's Liberty Square honors the former U.S. president's efforts to end the Cold War.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

A fascinating insight into daily life in the Eastern Bloc.

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

The most visited, and possibly most controversial, museum in Germany.

Nordic giants resurrected from the sea and restored to their former greatness.

Old Danish castle immortalized in Shakespeare's Hamlet.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

Copenhagen's celebrated theme park and gardens.

The discovery of an old wall led to the creation of this fascinating museum about the city in the Middle Ages.

Stockholm's narrowest alley is barely over two feet wide.

An ancient Viking runestone hidden in plain view in Stockholm's old town.

It houses the remains of a 17th-century version of the Titanic.

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

The sister plane of the C-123 shot down during the Iran-Contra Affair has found a new purpose in retirement.

The capital of the Cayman Islands is a center of offshore banking, but gets battered by blistering hurricanes.

The colonial city's social history is reflected in its fanciful door knockers.

The location of this historic castle was inspired by a donkey.