A giant Troll lurks under one of Seattle's oldest bridges.

A wall of chewing gum moonlights as collective art.

Inspiration struck on this seat outside the Griffith Park merry-go-round.

Home to the deepest rift anywhere on Earth.

Final resting place of two dozen New York City harbor ships.

Sports history, made in the Arroyo Seco.

This municipal playground was co-created by the father of one of the most playful characters ever.

A world-class observatory in the California desert.

A former gold rush boomtown has managed to stay in business for over 100 ramshackle years.

Every day a troupe of pampered water fowl walk the red carpet to their favorite fountain.

A towering tribute to decisiveness stands on the spot where Brigham Young and his followers decided that this must be the place.

The famous boat that once ferried Bogart and Hepburn still floats in Key Largo after being abandoned for years.

This giant temperature attraction created some giant electric bills.

This museum remembers the tough Mormon trek across America through an intriguing array of artifacts.

This Delaware River bridge is emblazoned with a catty slogan from a more prosperous time.

A desert ghost town—occupied for only 12 years—was once home to more than 500 silver mines.

Could this grave be the true resting place of legendary gunfighter "Doc" Holliday? Unclear.

A herd of 150 bison live on California's Santa Catalina Island and are at the heart of an ongoing debate between environmental protection and economic expansion.

The tallest The Church of Jesus Christ of Latter-day Saints temple in the world soars above the Beltway.

Elvis's own personal tropical hideaway.

The actual model from the original "Star Trek" series is now on display at the National Air and Space Museum.

The "lovely red Vega" of the legendary record-settling pilot.

While most wind tunnels test scale models, the "Cave of Winds" was large enough for actual airplanes.

A mistaken marker makes an erroneous claim along the historic Old Divide Road.