A much-maligned monument to teetotalism.

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

A historic ruin just 20 feet away from a busy highway onramp.

The privately owned cemetery that holds room for Washington's finest when they step down from life.

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

The famous abolitionist’s preserved estate is one of Washington's finest monuments to its great Black citizens.

Housing the National Women's Party since 1929, this historic house is now a monument to the fight for gender equality.

The only Civil War battle in Washington D.C. took place near this highest natural point in the city.

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

A Spiritualist house of worship where believers communicate with the dead in the spirit world.

This leafy estate is worth $18 million and is so grand it has two mailing addresses.

A lovely aquatic park built by a one-armed Civil War veteran who made a fortune from lotuses.

This lonely waterfront memorial to the men of the Titanic was erected by the "Women of America."

The house where John Wilkes Booth conspired with his co-conspirators.

This imposing Masonic temple a mile from the White House was the first public library in Washington, D.C.

Largest Roman Catholic church in North America.

During the Industrial Revolution this “Temple of Invention” was full of intricate miniature machines and gadgets.

A wondrous old library overlooking the nation's capital.

A Civil War fort in the middle of Washington, D.C. has been swallowed by a forest.

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

Enormous piles of historically significant stones, dumped by Congress in a forest, and abandoned for 60 years.

One of the dwarven trees dates back to 1625 and survived the Hiroshima bombing.

This grand gothic brewery has been pumping out suds for over a hundred years.

Home to items never before seen by the public.