A giant donut stands as a popular symbol of Los Angeles iconography.

The flagship building of an early national restaurant chain is a superb example of terra cotta art.

The preserved house of a jazz legend still echoes with his music.

The abandoned grounds and derelict greenhouses of this once-magnificent Edwardian estate are now a nature preserve open for exploration.

A touching tribute to the "Queen of Soul."

A mysterious air force base built to resemble a Long Island fishing village.

Possible relics of the ancient Roman city are hidden in this restaurant's façade.

This ruined fort hidden at the top of Central Park can't seem to keep from losing its historical plaques.

A whimsical brother of the nearby Fallen Angel statue takes the falling part quite literally.

Step back in time on this preserved 1800s farm.

This road in the Great Smoky Mountains was supposed to assuage a displaced community, but ended up a $52 million dead end.

"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 scenic fort on the harbor protected Philadelphia from an attack that never came.

A former steam-powered mill from the 1800s is now an industrial park with a giant steel dragon slide.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

This historic fountain is a favorite neighborhood meeting point.

A lush indoor jungle fills this bustling Madrid transportation hub.

An ancient Egyptian temple in the middle of Madrid, Spain.

What was once a true peninsula has now been filled in, causing the water to recede and leaving many streetside "waterfronts" and landlocked "islands."

The largest body of water in Massachusetts annihilated four small towns just to slake Boston's thirst.

The birth home of one of cinema's legendary actresses.

This historic patch of real estate offers a glimpse of colonial Boston.

A spooky and decrepit mental health facility is slowly being replaced with newer digs.

Inspiring Herman Melville and Henry David Thoreau, Mount Greylock in western Massachusetts is the highest point in the state at 3,491 feet above sea level.