The longest escalator in the Western Hemisphere takes over three minutes to ride down.

The tallest The Church of Jesus Christ of Latter-day Saints temple in the world soars above the Beltway.

The wooded estate of the Forest Service employee responsible for D.C.’s cherry blossom trees.

FDR's Art Deco hospital tower was hopelessly inefficient.

Residing quietly in suburban Maryland, this tree has a star-powered history and was grown from a seed that journeyed to space on Apollo 14.

This mighty white oak in Bethesda survived both the American Revolution and the construction of Washington D.C.'s metro red line.

A random tree outside a Budapest hotel has become a DIY shrine to the late singer.

Museum dedicated to the terror regimes of Hungary.

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

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

Once the home of a hermetic monk, this cave now houses a small church.

A line of disused military bunkers built to defend against Nazi invasion lies hidden on the outskirts of the city.

Thousands of slain Soviet soldiers are buried within the shadow of this enormous obelisk.

In an area known in Bratislava’s postal history, this sculpture sits equipped with a functional postbox.

Launched by Napoleon's soldiers more than 200 years ago, a cannonball remains embedded in the tower wall.

Dedicated to a synagogue that was destroyed after having survived World War II.

A sculpture of the beloved author surrounded by characters from his fairy tales.

No one knows the origin of this creepy little stone man with an oversized phallus.

A sculpture of a beloved local figure, who tipped his top hat to everyone he passed on the streets of Bratislava.

This Slovakian statue of an emerging sewer worker might just be a bronze peeping tom.

In the middle of a Vienna square, Roman ruins dating back some 2,000 years are on display.

Baroque celebration of the end of the Great Plague of Vienna.

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

This Slovak bridge is known both for its connection to a national uprising and its UFO-shaped eatery.