In the past, Renaissance sex workers were encouraged to entice customers on this bridge.

Two stone columns flank the grand Venice square, but there were supposed to be three.

A large grotto built in the 16th century amidst Florence's famous Boboli gardens.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

The prototype for all Nazi concentration camps.

A memorial to the nearly 10,000 American soldiers laid to rest on the beaches of Normandy during WWII.

Pilgrimage site for star-crossed lovers.

Equal parts record-breaking temple to consumerism and bizarre fun park, it's more than you think it is...

This Yellowstone geyser may not shoot as high as the nearby Old Faithful, but it erupts for considerably longer.

"X" marks the spot of an echo chamber in the middle of a plaza.

Cleveland's giant "free" stamp is a nod to the Civil War, but was misinterpreted for years.

This historic train station has been converted to a locomotive themed hotel.

3/4-scale model of the White House in Atlanta, Georgia.

A monument celebrating the idea of reaching inaccessible places.

Atlanta's strange assortment of concrete pillars inspires reflection in some, confusion in others.

An architect's childhood fantasy treehouse made real.

Live long and prosper in Tennessee.

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.

Every day a troupe of pampered water fowl walk the red carpet to their favorite fountain.

Labor provided by Great Depression-era programs restored these 25,000 acres in Tennessee.

The largest cemetery in the American Southeast is a hidden gem near the heart of Atlanta.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.