An emporium for the weird, creepy, rare, and just plain gross.

These old stone ruins in the Oregon wilderness were once bathrooms and are steeped in legends of murder.

This communist behemoth is the heaviest building in the world and a legacy of a brutal regime.

An ode to a chess-loving diplomat.

These haunting ruins of a 700-year-old Prehispanic city have witnessed centuries of wars and massacres.

The giant statue and its model solar system honor the native Pole who declared that the Earth revolves around the Sun.

A menacing statue of this mythical creature can be seen at the legendary site of the monster's lair.

A statue honors the children who fought Nazis in Poland.

The Polish capital has had a deep connection to its guardian mermaid for almost a millennium now.

A tribute to the Polish insurgents who fought in the failed attempt to end their city's Nazi occupation.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

Steadily reminding Czechia of its past.

Synagogue built from the stones of Solomon's temple contains the golem of Prague.

Monument to a suicide protesting the Soviet invasion.

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

This water-tower-turned-high-end-apartment building was once the site of an early Nazi concentration camp.

An old department store turned Nazi prison turned artist commune.

Cold war icon and onetime "hole" in the iron curtain.

Blitzkrieg bop your way through Berlin's Ramones Museum.

A slice of central Asia in the middle of Berlin.

The largest free-standing aquarium in the world resides in a hotel lobby in Berlin.

Beneath the impressive baroque cathedral that rises from the center of Berlin lies the largest collection of Prussian royals in the world.

The bunker where Hitler took his own life is hidden under this deliberately ordinary parking lot.

This Hungarian castle was built out of cardboard and wood until it proved so popular that it got upgraded to stone.