Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

These eerie outliers of the lightning bug family glow a mysterious blue color.

This weeping, 10-foot-tall sculpture was a maquette for a 9/11 memorial.

This rare triple-jurisdiction drawbridge passes through Virginia, Maryland, and Washington, D.C.

The 72-foot giant escaped confinement in a large patch of mulch only to be reburied in the sandy shores of the Potomac River.

A memorial dedicated to a highly decorated Marine and Korean War veteran, who also happened to be a horse.

This 29-ton granite ball spins around at the slightest touch thanks to a scientific phenomenon.

This research center for rare prosimians is studying how they sleep to help prolong human life.

This giant iron playfully pays tribute to an early 20th-century architectural trend.

Who needs fancy modern water slides when this giant North Carolina rock works just as well?

A 315-foot spire jutting out from the Blue Ridge Mountains makes for breathtaking views.

This roadside attraction has been serving out its fair share of hearty folklore and chaos since 1858.

This metal disk commemorates the birth of a historic American holiday.

This bright yellow relic is the final survivor of a short burst of seashell-shaped petrol pumps.

Forget Hollywood, one of the biggest stars in the world can be found in Roanoke, Virginia.

Lines from a walking song are etched into a rock in Natural Bridge State Park.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

Though the case is scorched and the buttons half-melted, this hardy handheld gaming device can still run a game of Tetris.

This tall and trim architectural oddity is one of the skinniest buildings in San Francisco.

A collection of 20th-century automata, penny arcade games, and musical contraptions.

A burnt orange monolithic dome structure perched on a hillside near Interstate 280.

A life-sized mammoth sculpture marks the spot where the remains of a Columbian mammoth were discovered in 2005.

These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.