Twisted buildings adorn the banks of the Rhine river.

An eccentric home stands out in an otherwise average neighborhood with mosaics, mini topiaries, and kinetic sculpture.

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

Scattered throughout London are ancient remnants of the city's former bounding wall.

This secret coastal village is studded with pastel-colored houses all piled on top of one another.

The site of the deadly Triangle Shirtwaist Factory Fire.

The celebrated eyesore created by starry-eyed sweethearts.

Ancient snack bar of the Roman Empire re-opened.

Nuclear reactor created the plutonium used on Nagasaki.

2300-year-old Roman road connecting the empire.

A spiritual vortex among the red rocks in Sedona.

At 207 feet, one of the world's longest continuous escalators.

Seat of the Duke and Duchess of Devonshire for centuries.

Fountain where visitors can earn a license to be mad.

Large collection from the 3rd millennium BCE.

Seven ceramic sculptures are scattered around this California college campus.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

The once forbidden "secret cabinet" of erotic art from excavations of Pompeii and Herculaneum.

International delicatessen has been owned and operated by the same family for more than 110 years.

The hotel where Martin Luther King Jr. was shot is now a museum dedicated to his work.

Gothic tower mentioned in Thomas Hardy poem "The Channel Firing."

Children's hospital in London that operates on royalties received from Peter Pan, which J.M. Barrie signed over in 1929.

A museum on the history of Paris, including a set of Napoleon's toiletries, Proust's room, and relics of the Revolution.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.