Berthed at the Charlestown Navy Yard in Boston, "Old Ironsides" is the oldest commissioned warship still afloat.

This small section of the Sleepy Hollow Cemetery is rotten with famous authors' graves.

This peaceful Massachusetts graveyard was one of the first "garden-style" cemeteries in America.

Two thousand artifacts from around the world collected by one woman who loved to travel.

One of the oldest used bookstores in the U.S. has been selling antiquarian treasures since 1825.

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

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

This monument on Breed's Hill proves that one of the most famous battles of the Revolutionary War is misnamed.

This quiet neighborhood is also home to a 700-ton rock transported by the last Ice Age.

Old submarine parts have been converted into faux whale fins.

Though strikingly beautiful, Seattle's other railway station is now largely forgotten.

Medieval museum built over Roman baths that features famous tapestries of a lady and a unicorn.

Harry Potter once visited this massive limestone cliff, which was carved by an ancient glacial river.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

After nearly 60 years, there's still a bear at Paddington Station looking for help.

Hidden in an ordinary Midtown building is a one-room museum dedicated to the greatest escape artist.

Elevated freight railway turned wildly successful urban park.

The narrowest street in Canada was once a spot for dastardly doings, now a historic piece of Chinatown.

A famous hotel houses an impression collection of mini dioramas and giant doll houses.

A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

Statues of Ramona Quimby, Henry Huggins, and Ribsy the dog in the park where their adventures "really happened."

Once a year, thousands of naked cyclists flood the streets of a Seattle neighborhood.