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

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

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

This monument on Breed's Hill proves that one of the most famous battles of the Revolutionary War is misnamed.

This landmark cemetery in Boston was created more than 300 years ago.

The site of Paul Revere's historic two lantern warning.

Berthed at the Charlestown Navy Yard in Boston, "Old Ironsides" is the oldest commissioned warship still afloat.

A remnant from the golden age of aviation still in use today, Pan Am's Clipper service took off from this Art Deco gem.

What happens here stays here – unless it affects the whole world.

The site of the deadly Triangle Shirtwaist Factory Fire.

Visit the monolithic tomb of America's most famous general.

Spinning silently in the lobby of an Art Deco masterwork is a massive vintage model of the Earth.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

An uber-secure, windowless tower of doom in the center of Manhattan is an NSA spyscraper.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

The "mysteries" of this quintessential roadside oddity were almost destroyed by neglect but were saved by fans of kitschy wonder.

One day a year it is legal to jump off of this astoundingly tall bridge that spans an Appalachian gorge.

A smoke stack so large, the Washington Monument could fit inside!

The last physical evidence of the Lewis and Clark trail is one of their autographs etched into this giant rock.

The only road through the heart of Glacier National Park.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

This relatively recently abandoned brewery is a tragic reminder of the continuing effects of Hurricane Katrina.

This distinctive Crescent City tradition dates back to the days of horse-drawn carriages.