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

A cave on the Maryland border where civilians took refuge during the bloodiest battle of the Civil War.

Walk a trail through a historic Quaker town that outlawed slavery in 1777 and was a major waypoint on the Underground Railroad.

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

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

The ruins of this long-abandoned unsuccessful gold mine can still be found.

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

This beloved Baltimore spot features caged dolls, a giant Pez collection, and many, many mannequins.

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

A local farm's collection of unusual structures from a now defunct storybook amusement park.

The land is home to swimming ponies and a legendary 18th-century treasure.

Bizarre Cavern.

The site where Poe "in great distress, and ... in need of immediate assistance" likely died.

The trials and tribulations of marking Poe's grave.

Built by the patriotic residents of Boonsboro in a single day.

One of the only memorials dedicated to journalists who died in combat.

This Maryland farm is known for its amazing corn mazes and its 30-foot junkbots.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

The ruins of this Thomas-Jefferson-designed mansion have been left to crumble since the Christmas Day they burnt down.

A railroad tunnel that, upon its completion, was considered one of the engineering marvels of the modern world.

One of the last active volcanoes on the Eastern seaboard.

An enormous warehouse filled with parade floats collected from over 50 years of patriotic celebrations.

Developed by focused shutterbugs, this museum exposes visitors to more than 6,000 different cameras.

A former mental hospital founded in the 1930s by a eugenicist who advocated for the forced sterilization of patients.