This historic observatory contains the world's oldest refracting lens telescope.

Avoid gangster interaction while window-shopping.

The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.

Historic Hull Street was actually the first street with a proper name in the Boston area.

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

Stunning Roman aqueduct used for 1900 years and still standing.

"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."

Abandoned bull fighting ring, slowly falling apart in Uruguay.

A haunting tribute to pioneering photographer Clover Adams.

America's first federal monument.

The site of the climactic scene from the classic horror film is now a historic landmark.

The most confusing clock in New York.

Dodge prohibitionists and slide through the telephone booth in Crif Dogs.

Bouncing, delightful, mechanical art at the MIT Museum.

Narrowest house in Boston.

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.

Golden Gate Park's historic collection of plants.

This landmark cemetery in Boston was created more than 300 years ago.

Books you don’t need in a place you can’t find.

An old trolley bridge was converted into a breathtaking garden bursting with colorful flowers.

Over 50 whirling pools left behind from the glacial age.