One of the best-preserved Roman amphitheaters is still used today, but for less brutal events.

A deserted medieval village where bodies were once mutilated to prevent them rising from the dead.

A Reformation-era fiery figurehead once denoted this location as a print shop.

The National Railway Museum in York is the largest railway museum in the world, attracting almost 1 million visitors per year.

This network of narrow, medieval passages has the most delightful name.

This innovative steam machine was no doubt the most famous of the pioneer locomotives.

The elegant structure of this 19th century railroad bridge creates an illusion of infinity.

This popular square's history as the former site of a church is right beneath your feet.

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

This restored Portuguese cafe may well be the most beautiful place in the world to grab a Big Mac.

An early work of the architect Álvaro Siza Vieira, these swimming pools blend into the beach.

A hidden three-foot-wide house separates these two regal churches.

This historic streetcar system has been running since the 19th-century.

One of the earliest large-scale "hyper" roofs in the U.K. is now a derelict roadside attraction.

The rusting relics of Southampton's former luxurious flying boat industry.

A half-mile-long stretch of medieval forts built after a devastating pirate attack persists amid the modern port city.

This 700-year-old storehouse was a POW jail, aviation workshop, and Titanic memorial before becoming a brewpub.

A trough of 700 strange bronze faces runs through a narrow alley in Ljubljana's old town.

Martin Bricelj Baraga's monolithic sculpture measures the blueness of the sky, and changes color to match it.

A whimsical bridge adorned with decorative dragons.

Soaring over 6,000 feet in the Bavarian Alps, this beer garden was once Hitler's 50th birthday present.

Those belting out show tunes in this West Village piano bar might not realize it marks the site where Thomas Paine died in 1809.

One of several Lilliputian portals that are ready to transport passengers to other dimensions, if they can find them.

Named after a lodging site that existed nearby, a bridge has existed at this location since 1455.