This fortress was designed to prevent a Nazi invasion but was never used.

This almost a century old piece of architecture had been overlooked by most, except for the drunk and the homeless

Folklore says this medieval fortress was plopped atop a portal to hell to trap the demons below.

Two monstrous faces loom over a village in Czechia.

Created as a "model concentration camp" to hide Nazi atrocities from the international community, this former camp-ghetto now holds a museum and memorial honoring the lives lost within.

Heralded as one of the prettiest castles in all of Czechia.

The sanctuary holds what was once believed to be the saint's incorruptible tongue.

A plaque marks the spot where the saint was shoved off the Charles Bridge and into the river.

An army of sleeping knights sculpted by a self-taught local artist beautifully depict an old Czech legend.

Nine bronze hands protruding from a wall honor the student uprising that led to the fall of Czechoslovakia's Communist government.

The 14th-century ruins are said to contain healing powers.

Steadily reminding Czechia of its past.

The soulless eyes of 82 bronze children stare on forever in remembrance of a horrifying World War II massacre.

Bullet holes in the church wall are a reminder of the violence that followed the assassination of a high-ranking Nazi officer.

Monument to a suicide protesting the Soviet invasion.

A once-thriving hotel in the Swiss Alps couldn't compete with climate change.

The alpine falls where Sherlock Holmes apparently met his demise can actually be visited.

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

Built as an anti-fascist tribute, this surreal Yugoslav memorial became an unwelcome symbol after the Croatian war for independence.

A tower marking the spot where Yugoslavia began its resistance against the invading Nazis stands neglected, but not quite forgotten.

Croatia's "hairy stone" fortress is one of the most well preserved Istrian castles.

Humble beginnings for one of the world's most famous scientists.

This stunning, out-of-the-way Croatian monument commemorates a community's uprising against occupying fascist forces.

Christianity and Islam have clashed, yet here a Serbian Orthodox church and a mosque stand together.