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

Home of a 28-foot tall stalagmite known as the War Club.

A monument marks the location of the first successful steamboat demonstration.

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

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

Unannounced visitors are now welcome at the site of the largest Prohibition-era bootlegging operation in the region.

This striking arch, one of the first architectural elements constructed in Prospect Park, was recently restored to its original glory.

This city park was once a lookout point for George Washington’s army during the Battle of Brooklyn in 1776.

This narrow canyon has been carved by the river over thousands of years into spectacular and curious forms.

The New England cabin where an infamous British occultist conducted experiments in "magick".

This location of a Mexican chain restaurant has a unique location: an old jail.

Murder scene memorialized in perpetuity by grisly obelisk.

America's oldest archaeological site or a muddled case of wishful thinking.

Ruins of the elaborate house where the enigmatic costume designer threw glamorous parties for New York's theatrical elite.

Resonating tubes make music from highway overpass.

This abandoned neighborhood is now a park filled with beautiful trees, wildflowers, and hints of its past.

This Catskills museum preserves stumps from the earliest known fossil forest on Earth.

Discovered by cows, these upstate New York show caves are presented with a healthy dose of psychedelic folk art.

Why have you never heard of the second most popular tourist site in New York?

Steam engines and conveyor belts are remnants of a genius system left in the middle of the Maine woods.

This controversial statue has migrated twice in its life.

A Victorian cemetery in the heart of Brooklyn remains a popular mecca of morbid curiosity.

A curious friendship between two inanimate ladies.

The gravestone of an eccentric Connecticut doctor features dinosaur tracks and a pair of fossil tree casts.