The world-record holder for the longest bridge stretching continuously over water.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

Tucked away in the Tower of London is the weapon once used to execute high-profile prisoners.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

The world's largest outdoor organ is played weekly by one of just two civic organists in the U.S.

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

This local gem houses the largest collection of pre-Raphaelite paintings outside of the U.K.

The oldest working bell set in North America, the bells at Old North Church sat silent for their first four years in Massachusetts.

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

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

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

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

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

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

The 340-year-old house that inspired the classic Nathaniel Hawthorne novel.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

A mysterious stone embedded at the base of a historic Boston building.

One of the largest trees of its kind in California.

A 19th century library favored by Edgar Allan Poe and H.P. Lovecraft, known by locals as "the Ath."

A monument celebrating the idea of reaching inaccessible places.

I-95's Tijuana-style celebration of kitsch at the Carolina border.

The island residents are known for taking their quirky sense of humor with them to the grave.

A bizarre house filled with an astounding array of collections.

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