Take a steam-powered ride straight out of the past on this Appalachian rail line.

The world's largest fully steerable radio telescope.

A hidden alley in urban Baltimore is a haven for graffiti artists.

Legends surround this jagged rock formation in the New Mexico desert.

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

Vintage cars and motorcycles race for glory in a throwback motorsport celebration on the Jersey shore.

World War II bunker still standing on the New Jersey beach.

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

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

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

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

The remains of a community that was forced to move for a dam that never materialized still rot in this Pennsylvania park.

A modern ghost town whose inhabitants were driven away by the growth of nuclear power.

Exact replica of the ancient monument, but much, much lighter.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

This rural community has attracted both scientists and techno-refugees due to its federally-mandated lack of technology.

The highest point in Maryland is only accessible by hiking through another state.

The sci-fi villain is a little-known inhabitant of the U.S. capital's largest cathedral.

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

One of the oldest living oak trees in the Southeast.

Collection of trolley cars in the woods represent one man's attempt to preserve transportation history.

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

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

Abandoned concert venue legendary for its rock counterculture.