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

The semi-reclaimed ruins of this canal were once part of an ambitious plan to reroute the mighty potomac.

This ruined quarry once produced the distinctive red sandstone used for construction projects in Washington, D.C.

The oldest surviving one-room schoolhouse in Montgomery County, Maryland.

The last holdout of a pre-Civil War rebel who took the matter of slavery into his own hands.

This advertisement for talcum powder was painted on the rock face and has since defied removal.

Washed out by the Johnstown Flood in 1889, the surviving portion of the original two-span bridge now resides at Fishing Creek.

This hidden treasure provides a charming access point along the south side of Baker Park.

A pre-Industrial Age iron furnace and the site of a nearly-forgotten piece of Black history.

This general store is more than a century old and home to various oddities and antiques.

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

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

An Olympic hero stripped of his medals is buried in a town he never visited, which took his name after his death.

The dairy farm in upstate New York where nearly half a million people gathered for three days of peace and music in 1969.

The first declared National Monument in the United States.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

Giant six-pack could provide one person a six-pack a day for 3,351 years.

Homemade outdoor church and sculpture garden decorated with glass shards.

These molds for fiberglass statues have formed an eerie, accidental sculpture park.

The world's oldest continuously operating airport was founded by the Wright Brothers.

This bug-eyed water wheel uses the power of the Sun to clean up Baltimore Harbor.

Baltimore's classic clock tower was once topped by a rotating, 20-ton medicine bottle.

A museum dedicated to exhibiting remarkable outsider art.

Electronic inventions that resulted in products and systems we use every day are on display in this labor-of-love museum.