Bohemian paradise covered in majestic forests.

A fairytale Gothic castle steeped in Nazi treasure conspiracy theories.

A museum honoring Germany’s cucumber mecca offers a great dill of gherkin history.

This unique 230-foot waterfall is a natural beauty hidden within the vast wild landscape.

An engineering wonder at Pillnitz Castle protects a precious 230-year-old flowering shrub.

The Victorian-era greenhouse is stuffed with tropical plants, and open 365 days a year.

The stunning interior of this Gothic church is covered in ornate gold details.

Elaborate tile work in this railway station tells the story of Portugal.

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

The world's oldest bookshop still in operation.

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

This macabre masterpiece of a mural is one of Francisco Goya's "Black Paintings."

Budapest's Communist-era statues, banished to the suburbs.

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

A museum in the childhood house of a medical pioneer.

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

A 19th century artistocrat's mansion, turned into a library, hidden in a modern library.

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

The birthplace of an eccentric alchemist and possible inspiration for the fictional reanimator of monsters.

A German apartment building hosting as many trees as human occupants.

Crop circles inspired this whimsical garden in Germany.

The world's first clock to use set theory as a measure of time required the invention of a new light bulb just to maintain its obtuse measurements.

A two-inch thick solid brass rod that extends an astounding one kilometer straight into the earth.