A star fort along the C&O Canal in western Maryland that protected America in three wars.

The last holdout of a pre-Civil War rebel who took the matter of slavery into his own hands.

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

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

This colossal war machine is now a living museum dedicated to underwater warfare.

The now-quiet remains of coastal artillery defenses that were used in both World Wars.

This old-fashioned roadhouse's quirky neon sign is as famous as its enormous dumplings.

Instead of hoofing it up steep stairs, residents can hitch a ride on this private lift.

Apartment building was once posh playground to the Hollywood elite.

Opened as part of the New Deal, the training facility now features World War II-era structures and a pylon that once stood at the World Trade Center.

This quirky UFO-shaped curiosity is often mistaken for the airport’s control tower.

An homage to the man who built California's version of Venice.

A gift from Abbot Kinney and a little bit of piece of Black history in Venice Beach.

Secret US military film studio in the Hollywood Hills.

Beautiful Victorian buildings from L.A.'s forgotten architectural past.

Two men, two visionaries of Venice Beach, one little hotel that smells like cookies.

The final resting place of a space program monolith.

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

World-famous, Pink's still manages to keep its prized cult fetish status.

Established in the '60s, a family-owned tropical drink bar founded by Ray Buhen, bartender to the stars.

This weird abode has inspired everything from the "House On Haunted Hil" to a robot hunter's pad.

Remants of foundations, streets, and streetcar tracks inhabit the cliffs where a landslide occurred in 1929.

Giant origami crease patterns engraved in Santa Monica intersections may even be visible from space.

On a quiet suburban street stands a peculiarly decorated house covered in mosaics.