The oldest surviving example of the aqueducts that crossed the Casa de Campo to distribute water.

These abandoned country fairgrounds are filled with replicas of Spanish monuments.

Built to celebrate the glory of a new queen, this forgotten monument has moved around Madrid three times, reflecting 200 years of political whims and city redevelopment.

This funky former tobacco factory is one of the most striking examples of Madrid's cultural diversity.

This Art Nouveau gate still stands at the former entrance of a 20th-century Spanish writer's colony.

The oldest building in Madrid.

Infamous and now demolished panopticon prison built by its former inhabitants.

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

Central Europe's largest collection of mini-bottles is on display at this museum devoted to a bitter Hungarian liquor.

A fake Transylvanian castle houses a cathedral of antlers.

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

Electrical curiosity museum housed in an old transformer station.

A multi-storied painting that depicts the area's rich and diverse maritime history.

These trenches were used to train the Scottish military for life on the frontlines of World War I.

Small museum dedicated to the founder of electromagnetic theory.

The colorful stairs are made with marble from the world's major quarries.

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.