Philadelphia boasts one of the best — and most often overlooked — traditional Japanese gardens in North America.

Yo, Adrian!

Ant sculptures march up the side of what used to be an iconic spot in punk rock lore.

Mural made of 100,000 pieces of hand blown glass, and until recently, the largest glass mural in the US.

A daily replay of the experiment that proved the rotation of the Earth.

This knobby, drooping New Orleans oak is a favorite place both for climbing and for meeting giraffes.

A building that was once a general store, a speakeasy, and a newspaper office now holds a small gallery filled with New Orleans photography.

This historic "City of the Dead" lies prominently in the center of New Orleans' famous Garden District.

This New Orleans tree is filled with hidden chimes that produce a carefully tuned melody.

Taxidermied cartoon heads, unseen illustrations, and famous characters all reside in this small gallery space.

An Aztec snake god has taken the material form of an apartment complex.

A fantastic array of trays and cables once whisked books over to the Capitol at 600 feet per minute.

An atomic bomb-proof strongbox protects the U.S. Constitution from terrorists and thieves.

The most accurate timepiece in the world.

The world's largest occupied bat houses hold hundreds of thousands of flying mammals.

The sci-fi villain is a little-known inhabitant of the U.S. capital's largest cathedral.

A nostalgic bibliographic gem.

A celebrity from the late Cretaceous period.

A hidden gem on the lawn of the U.S. Capitol Building designed by landscape architect Frederick Law Olmsted.

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

This robust fence in front of a historic Georgetown home is likely made from hundreds of recycled Revolutionary War firearms.

Go take a picture with the inventor of the daguerreotype photographic process.

A three-story tower of books about Abraham Lincoln is one of the more unusual monuments to the president.

Long-abandoned trolley tunnels just a mile away from the White House are turning into an art space.