In 2013, historians discovered a hidden room devoted to the art of making royals' hot chocolate.

Nothing says indulgence like a 1,500-pound chocolate castle.

This historic hotel invented the chocolate brownie.

In the power of this waterfall, Alexander Hamilton saw the potential for industry.

These were the largest wind chimes in the world when artist Tom Van Sant created them for a California mall in 1967.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

This rare triple-jurisdiction drawbridge passes through Virginia, Maryland, and Washington, D.C.

Like a kitschy mirage in the Mojave, this eatery serves up classic 50s-style diner meals and a dinosaur sculpture garden.

Once in disrepair, this popular Texas stop along iconic Route 66 has been restored to its past glory.

This statue was given to France by the United States to commemorate the centennial of the French Revolution.

A blues musician so talented that people said he must have traded his soul to the devil was born in this house.

During the holidays, a vintage subway train whisks New Yorkers back in time.

A tunnel with windows, so you don't miss out on the impressive views.

This quarter-mile tunnel under the Bluff in Pittsburgh bends at a 45-degree angle.

Despite many attempts to finish this overpass, it has been abandoned since the 1970s.

An abandoned stretch of elevated road in the middle of the Brazilian jungle.

For roadside fast food, pull over at the giant orange.

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.

Imagine having a street run right through your home, or better yet, a historic bridge three stories high.

Part of a highway network meant to connect Miami to Montreal, this 10-mile stretch of road made from red bricks is still around 100 years later.

A remnant from the golden age of aviation still in use today, Pan Am's Clipper service took off from this Art Deco gem.

The remains of Crystal Palace Great Exhibition of 1851.

One artist’s scheme to expand museum viewing hours into the evening led to the illumination of an entire city.