Despite attempts by local police to discourage it, Beatles-inspired graffiti has been a means for artists to air grievances for decades.

Island where motor vehicles are banned -- home to the only carless highway in the United States.

Only hotel where you can legally launder money.

The only arched bridge made of stone on the entire Mississippi River.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

It houses the remains of a 17th-century version of the Titanic.

Baroque celebration of the end of the Great Plague of Vienna.

The fifth-longest suspension bridge the world, connecting one Michigan peninsula to another.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

The site of Paul Revere's historic two lantern warning.

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

The American Revolution was galvanized into serious action due to the tragic clash with British soldiers that occurred at this location.

A little sculpture with a large wardrobe.

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

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

A particularly creepy abandoned hospital that sparks interest for lovers of the supernatural.

Macabre astrological automaton clock dating to the late 1400s.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

A church of bones, decorated with 40,000 human skeletons.