Thousands of signed dollar bills turn a simple tavern into a living record of travelers’ comings and goings.

This 25-foot tall clock tower commemorates the start of one of America's foremost shopping districts and the end of the historic Palm Beach Pier.

One of the oldest, tallest, and most haunted lighthouses in America.

Along the banks of the River Rhine lies a park that seems unassuming, but beneath the surface lies a long and fascinating history.

A copy of the famous statue can be found in this Florence piazza, along with one of the most breathtaking views of the city below.

Visit Europe's largest subterranean waterfall, carved by water from the glaciers of the towering peaks surrounding the valley.

Fantastic views and thousands of love locks.

Carved fountains poignantly placed in parks and in front of special monuments.

Somber memorial to the May 10, 1933, book-burning which took place on this spot.

While you wait to cross the street at a traffic light in Mainz, you might notice that the light is staring back at you.

A historic casino where Dostoyevsky is said to have lost it all on a single spin of the roulette wheel.

This tremendous timepiece was once the largest cuckoo clock in the world.

The famed crossbow of Switzerland's folk hero now adorns a restaurant wall

Use a key to unlock this medieval sewer tunnel.

Drink wine handed out through a window as part of an age-old tradition.

The doodles of a genius line the walls of a secret room under the Medici Chapel, where they were hidden for nearly 500 years.

This private skyway is filled with art and was expanded explicitly so that Hitler could appreciate a river.

A dismembered holy head stares out from her beautiful reliquary at the St. Dominic Basilica.

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

This small Key West museum is packed with dozens of artifacts that illustrate the life of the iconic playwright.

Florida's oldest bar was once a morgue, complete with a hanging tree and gravestones.

A throwback train ride transports passengers through one of the lesser-known national parks in the country.

The oldest operating hotel in Illinois enjoys a historic (and some say haunted) past.

Dozens of large steel sculptures fill this two-acre park outside a former blacksmith's studio.