Nicknamed “The Mushroom,” this unique water tower has been featured in several iconic movie scenes.

First founded in 1472, this is the oldest bank in the world. Its history may explain why we call financial institutions "banks."

Geothermal waterfalls in Tuscany.

The remains of a town so thoroughly destroyed by French forces that the citizens simply left.

This caldera was once associated with the Etruscan god of the underworld.

Medieval town turned hippie commune, once home to the secret foreskin of Jesus Christ.

The ruins of a thousand-year-old hermitage are tucked away deep in the sloping forests of Albano Lake.

Things seem to roll, flow and run uphill on this short patch of road near Ariccia, Italy.

This ancient trail climbs the mountain where a Latin League cult worshipped Jupiter, its main deity.

Caligula's colossal pleasure ships, discovered by Mussolini only to be lost in flames.

Pulled from the rubble of one of the worst modern tragedies, a steel crossbeam became a symbol of hope for New Yorkers.

A remnant of the original World Trade Center complex continues to serve as a commuter gateway.

The last living thing to come out of the rubble after 9/11 is now a symbol of hope and resilience.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

The home of the first American-born saint is one of the only curved buildings in New York.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

Long the exclusive domain of birds and vagabonds, this little-known Central Park peninsula is open to the public once more.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

The 28-foot granite map plots the locations of 40 theaters in New York City.

Commemorating the spot where the famous scientist fed his pigeons.

This monument to a veteran of the Mexican-American War is one of only two in Manhattan that serve as an actual mausoleum.

Lady Liberty's first beacon of enlightenment is now displayed in a museum near the statue.

Now abandoned, the first public health hospital in the U.S. saw more than one million immigrants from around the world.