Narrowest house in Boston.

Beautiful steampunk ghosts of early Massachusetts.

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

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

The Burnside Fountain and its questionable interpretation.

This little-known rival to the Library of Congress houses one of the largest collections of pre-1876 American books, newspapers, and manuscripts.

This miniature feudal castle was built on a whim to honor a US Navy pioneer.

The headquarters of the famous Yale society.

An extra-wide chair built to accommodate the former president's big behind.

This once-grand marvel of engineering is now 41 miles of scenic hiking trail.

This tiny church near Sleepy Hollow contains Henri Matisse's last work, a rose window, and nine windows by Marc Chagall.

A statue honoring 44 continuous years of greeting passing ships.

Oldest existing church in New York and the inspiration for Washington Irving's "The Legend of Sleepy Hollow."

Mansion and shopping center used in the 1975 film "The Stepford Wives."

An old train trestle re-imagined as an Egyptian obelisk.

This titanic steel chain linking two buildings was installed without permission but instantly beloved.

This psychedelic tromp l'oeil seems to be beckoning drivers to crash into a wall.

South Carolina's last remaining slavery auction house is now a museum devoted to its own tragic history.

Once the most flame resistant building in the country, the South Carolina Historical Society building was almost burnt down in a fire.

Paths are maintained, but trees have taken over plots.

Charleston's historic city jail once held everyone from pirates to Civil War POWs.

Settled in 1696, abandoned after the Revolutionary War.

Oldest unrestored plantation house in America that is open to the public.

This recently rediscovered Civil War-era submarine was the first to ever sink an enemy ship.