The childhood home of Henry Jones Jr. is now an adventure-themed bed and breakfast.

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

A haunting tribute to pioneering photographer Clover Adams.

A computer bug so primitive it was an actual insect.

A small triangle of DC grass is the final resting place of one of Sonny and Cher's songs.

An unassuming, powerful monument north of the U.S. Capitol bears witness to the resilience of Japanese Americans during a time of grave injustice.

Four bald cypress trees in Lafayette Square, across from the White House, mark the southern edge of a 100,000 year old cypress swamp.

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

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

Giftshop catering to cryptozoologists and anyone with a sense of humor.

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

A memorial museum to the political prisoners who were held at Sighet Prison, once one of the most feared places in Romania.

A countryside Romanian cemetery filled with colorful crosses bearing lyrical, ironic, or satirical rhymes.

This Romanian village may have been drowned, but it is long from forgotten.

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

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

This once-palatial plantation may have been the site where a draft of the Declaration of Independence was written.

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

After hundreds of years of settlement, this once-bustling fishing village sunk into the Chesapeake Bay.

An obscure federal monument honors the French diplomat who served as Ambassador to the U.S. during WWI.

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

A diminutive memorial marks the site of a successful assassination by a right-wing death squad in America's capital.

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

There's a 12-foot-tall replica of the Washington Monument hidden under a manhole nearby.