The abandoned military base looks like a post-apocalyptic wasteland.

The massive white mound and accompanying water terraces are a striking geological oddity.

Hungarian self-built castle.

An industrial site turned into Hungary's most cherished natural wonder.

A two-way chairlift system between Zugliget and the highest point in the city.

This Hungarian stilt village is built in a lake that never freezes over due to the power plant that that uses it as a cooling pond.

This quaint Hungarian railway system is operated exclusively by children between the ages of 10 and 14.

Explore the complex ecology of this multifaceted nature preserve by riverboat.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

For patriotic Russians, this memorial honoring the Soviet soldiers who died liberating Berlin in 1945 is the most sacred location outside of Russia.

An imperial church bombed to ruins during WWII now stands as a jagged memorial.

A monument to the man who almost killed Hitler.

An abandoned NSA listening post on Berlin's "Devil's Mountain."

Late at night, the bust of the "Dracula" actor was snuck onto the facade of this Budapest castle.

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

An ornate private entrance to the Vienna subway built specifically for the emperor.

This grand manse has been transformed into a museum devoted to one of the founders of Fantastic Realism.

Some of the greatest minds in the history of Hungarian art and science converged in this café.

Everything from miniature biblical scenes to life-sized statues are almond-based at this sweet and nutty gallery.

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

Tucked away near more famous landmarks lies a statue meant to symbolize the confluence and continuing development of human culture.

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

Steadily reminding Czechia of its past.

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