A bizarre roadside attraction and the first instance of miniature golf in the world.

A star fort along the C&O Canal in western Maryland that protected America in three wars.

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

Despite its lavish ornamentation, and wholesome lifestyle of its devotees, this mountain commune has faced its share of issues.

A stone arch leads to a cavernous 1930s spring house tucked away in the Pennsylvania woods.

The last street in Pittsburgh that's paved with wood.

This historic furnace was once used to produce cannonballs during the Civil War.

The site of the little-known Pennsylvania battle that sparked the Seven Years' War.

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