Four hundred granite steps were built into this massive rock by the National Park Service.

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

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

Hear the quietest sound from across the dome.

One of England's most famous churches hides a pair of little known architectural treasures.

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

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

The rogue roots are gradually consuming some of the historic marble grave markers.

Soldiers were buried next to Lee's house in the center of Arlington Cemetery to dissuade the general from reclaiming his property after the war.

A floating cat sanctuary on an Amsterdam canal.

These slanted cubic abodes are a creative if odd solution to a zoning pickle.

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

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

The stately birthplace of California's statehood.

This remarkably simple jail went over a century without an escape.

The oldest U.S. Government building in California, and it's State Historic Landmark #1.

Steinbeck's old stomping grounds, immortalized in Cannery Row.

An old whaling station now serves to give the public a look at the commercial whaling industry, no longer a part of Monterey's economy.

Offering commanding views of the California coastline, this restaurant was a hub for the artists and bohemians of Big Sur.

A marvel of Byzantine engineering under the streets of Istanbul.

"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."

A glass and sculpture wonderland forms an oasis in a remote part of Kenya.

Haunting and beautiful trees, doomed to die.

A water tower shaped like a giant coffee pot looms over a small Swedish village in Central California.