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

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

The shelves in the back of this thrift store are devoted to saving, not selling, retro tech.

A diminutive plaque recalls the treetop sniper who almost killed Abe Lincoln.

The rooster who crossed the road lives on forever in Takoma Park, Maryland.

A benevolent, 16-foot-tall river dragon lives on a suburban lawn.

Giant acorn-shaped 19th century gazebo from which suburban Washingtonians gazed upon the original "silver" spring.

A girls' boarding school inspired by the Chicago World's Fair, once abandoned, now restored to strange and scenic glory.

Live data is transmitted from the Atlantic coast to instantly recreate the ocean waves in this fountain at the NOAA headquarters.

The longest escalator in the Western Hemisphere takes over three minutes to ride down.

Dogs, cats, horses, monkeys, frogs, and fish are laid to rest at the second-oldest pet cemetery in the U.S.

Electronic inventions that resulted in products and systems we use every day are on display in this labor-of-love museum.

The Forest Service's surprisingly sophisticated collection of wildfire prevention art features America's most beloved bear.

A remote horde of architectural treasures fit for Indiana Jones.

The haunting "Hell House Altar" is one of the few remnants of an abandoned college that has been a magnet for local legends.

A suburban museum tells the story of a historic transportation network and even provides rides in antique trolley cars.

An allegorical sculpture in Maryland wears the artist’s politics on its trunk.

Walk a trail through a historic Quaker town that outlawed slavery in 1777 and was a major waypoint on the Underground Railroad.

This dig site outside D.C. is known for its exceptionally high density of baby dinosaur fossils and dinosaur eggs.

A historic estate packed with George Washington's heirlooms, and its own nuclear bunker.

The winding route passes through an enclosed alleyway, two tunnels, and leads to the White House basement.

A painfully obvious spy house sits right across the street from the Russian Embassy.

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

A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.