Piled high inside this warehouse and coffee shop are salvaged goods that span every corner of the globe.

The magazine keeps a perfectly groomed display garden for its photo shoots.

A hidden barn-sized rendition of Grant Wood's most famous, and most parodied, painting.

Beating out all other concrete competitors, this massive garden feature's pointy hat has earned it a world record.

An 18-mile-long tunnel for sewage waste will soon wind within the bowels of Washington, D.C.

In this cemetery stands the country's first public crematorium.

The enormous 250-room Vanderbilt mansion conceals hidden doors and secret passageways.

A cement mixer-turned-kaleidoscope in downtown Norfolk offers different views of the city.

An overgrown garden stands as a grim marker of an unrealized dream.

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

A historic arena where the Beatles played their first concert in the U.S.

Obscure Freemasons still live in D.C.’s largest private residence.

Home to a vast and influential collection of Shakespeareana.

The oldest continuously operating fish market in the United States.

When it opened during the final years of the embargo, all the drinks and cigars were free.

The country's oldest continually-operated mini golf course lies hidden in plain sight, eclipsed by one of D.C.'s most popular tourist attractions.

Fittingly, America's museum of architecture is itself a magnificently designed old building.

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

A tiny piece of the Moon is embedded in this stained glass masterpiece.

A historic neighborhood church is reborn as a psychedelic arts collective.

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

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.

The remains of a failed attempt at medieval nerdery are hidden deep in the woods of Virginia.

America's first public mental health facility.