Once the "Eighth Wonder of the World," this iron railroad bridge was decimated by a tornado.

These beautiful ruins deep in the Pennsylvania woods are thought to have been a ski lodge or a speakeasy, but no one really knows.

A beautiful oddities shop crammed with strange and morbid curiosities.

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

Sail through this subterranean show cave that is home to a legend that would go on to name nearly everything around it.

An abandoned stretch of highway, deteriorating next to the operational one.

House of vintage taxidermy and Steampunk sculptures in a quiet Pittsburgh neighborhood.

Mysterious rocks that ring musically when struck.

Philadelphia boasts one of the best — and most often overlooked — traditional Japanese gardens in North America.

Visit a replica of the estate where Aaron Burr allegedly plotted a treasonous scheme against the United States.

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

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

Near-constant high winds deform the trees on Spruce Knob, the highest point in West Virginia.

A table rock formation that has been intriguing West Virginians for years.

The "mysteries" of this quintessential roadside oddity were almost destroyed by neglect but were saved by fans of kitschy wonder.

Beyond the usual stories that attend old prisons, this one has deep bloody undercurrents.

This red-eyed chrome beast pays homage to the popular modern myth of West Virginia's insectoid monster.

America's post-nuclear-attack chambers of Congress.

The last remnants of Fort Pitt also hold the distinction of being the oldest structure west of the Allegheny Mountains.

When oil was discovered just outside of Pittsburgh, the city became home to this regional stock market.

This secluded walking trail is a hidden gem of a Pittsburgh park.