Despite violent work crews and massive delays this abandoned canal tunnel was built to last into the modern day.

A haunting exhibit in a wildlife refuge center highlights threatened species and the conservation efforts needed to save them.

An FDR-era tuberculosis sanatorium has stood abandoned in the suburbs of the U.S. capital for over 30 years.

A historic Maryland home that once belonged to a man who has been called "the most insignificant" U.S. Supreme Court justice.

Remains of a historic fountain that was mysteriously lost in the demolition of a D.C. traffic circle.

This scenic Maryland park was the site of one of the worst prison camps of the Civil War.

An eerie, abandoned military base engulfed by nature and graffiti is now home to a local park.

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.