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

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

Franciscan monks created a facsimile of the Holy Land for North Americans who couldn’t afford the trip overseas.

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

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

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

A relic of FDR's brief foray into utopian urban planning.

A lawn full of retired spacecraft on display at one of NASA's first research labs.

One of the oldest anatomical theaters in the U.S. still in use was once the site of an infamous cadaver riot.

Brain collection and database that narrows the gap between man and animal.

The design of this historic domed church was influenced by Thomas Jefferson and intended as a statement of religious freedom.

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

A model home in the Medical Examiner's Office in which grisly death scenes are staged to train forensic investigators.

A 200-year-old bar with a cheeky name claims to have served Edgar Allan Poe his final drink.

Once home to seven different roller coasters, Glen Echo has undergone many transformations since its founding in 1891.

An eerie, decaying ghost town destined to fade into the forest.

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

Fiji mermaids, mummified remains, and recreated cryptids are among the morbid oddities at this Maryland museum.

An intricately designed junk art house with four extravagant junk art cars hidden in the suburbs.

The man who first patented the Ouija board rests in peace beneath a headstone that playfully reflects that achievement.

The trials and tribulations of marking Poe's grave.

This plaque marks the spot where the first crossing guards helped get kids safely to school.

Built in 1931, this small passageway is believed to be the first modern skyway.

One of the world's premier laboratories for hydraulic engineering research takes full advantage of the water's power.