This pre-Revolutionary War grist mill ground corn and flour for soldiers in seven American wars.

This restored house built from a Sears kit in the 1930s is a physical remnant of FDR's New Deal following the Great Depression.

The iconic D.C. restaurant where the Cuban Missile Crisis was negotiated, now a Walgreens.

You could be standing at the site of one of D.C.'s most fatal tragedies and not even know it.

A bizarre object of worship believed to grant wishes to those who tie it up with a rope.

Historic site where Native American hunters once trapped and killed buffalo.

Tour the sci-fi-esque reality of governmental disease management.

This museum, established in Butte's lost Chinatown, celebrates Asian-American culture in what was once the world's largest mining camp.

This landmark church at the Flathead Reservation mission features 58 ceiling and wall frescoes painted by the mission's cook.

This beautiful ancient site is dotted with perforated sandstone pillars considered sacred by some Native American groups.

A rapidly disappearing glacier filled with extinct grasshoppers, perfectly preserved in the ice.

This giant meditative chakra sits peacefully in the Flathead Valley of western Montana.

These recently uncovered walls are all that's left of Washington, D.C's first defense contractor.

A hoard of sky catalogs, astrophysical journals, even the works of Galileo and Copernicus.

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

A derelict bit of transportation infrastructure hidden in the woods.

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

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

This former asylum for Black Americans is haunted by its history of violence and racism.

This abandoned asylum was once a state of the art facility before devolving into one of the most deadly mental institutions in American history.

Remnants of a storybook amusement park hidden behind a strip mall.

In suburban Maryland, a tree grown from seed flown to the moon stands almost forgotten.

A museum dedicated to Latvian history in the heart of Maryland.

An old pay phone rewired to play local bird calls and songs at the press of a button.