A small Richmond island dotted with the remnants of hundreds of years of history.

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

Nine of the very few concrete ships ever made in the U.S. are beautifully decaying off a Virginia pier.

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

Heron, whitewater rapids, and urban industrialism all add to the beauty of this concrete nature walk.

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

Paranormal investigators claim this abandoned asylum is the most haunted spot in the eastern U.S.

A 300-yard long natural tunnel runs through a ridge deep in the Appalachian Mountains.

Outsider art meets paleontology at this roadside reptile repository.

The flower-shaped temple in Virginia aims to transcend the boundaries of the world’s religions.

This maze-like slot canyon is a unique gem within an already fascinating geological area.

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

The remains of a failed attempt at medieval nerdery are hidden deep in the woods of Virginia.

Giant busts of 42 U.S. presidents are sitting in a field in Virginia.

Residents of this Brooklyn neighborhood may be unaware their houses sit atop a buried trolley graveyard.

The site where Joe Gallo kept his guns, pet lion, and launched an all out mob war in 1960s Brooklyn.

Lehigh Valley barge No. 79 still gets tugged along - but now it houses a museum and unusual performances.

The humble fort that saved Washington.

The summit Roosevelt conquered before he descended to become The Chief.

This castle-like building in Manhattan helped destigmatize cancer in the 19th century.

This small road tunnel is the only place where you can cross beneath the Erie Canal.

This sprawling woodland estate was the brainchild of iconic American industrial designer Russel Wright.

A big shiny gin and whiskey distillery in Sunset Park.

The rustic think-space of famed naturalist John Burroughs stands exactly as he left it.