Civil War Fort on an island in the Boston Harbor.

The world's largest piece of copyrighted artwork.

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

An interesting decoration on this historic site, this weathervane comes with as many legends as it does questions.

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

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

An enormous, inside-out glass globe built in 1935.

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

"the sweltering inhabitants of Charleston and New Orleans, of Madras and Bombay and Calcutta, drink at my well . . . The pure Walden water is mingled with the sacred water of the Ganges."

Current docking place of the SS United States, the fastest transatlantic ocean liner.

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

The final resting place of American icon Buffalo Bill, and a museum that aids in telling his tale.

This tea house was a hand-built gift from Boulder's sister city in Tajikstan.

An annual festival celebrating Colorado's most famous frozen corpse.

An ancient knight and a symbol of the city's freedom.

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

Macabre astrological automaton clock dating to the late 1400s.