This once-grand marvel of engineering is now 41 miles of scenic hiking trail.

Read between the lines of the subway map to find the hidden abandoned Civil War fort.

The headquarters of the famous Yale society.

Final resting place of a New Haven urban legend.

Connecticut grave of the woman responsible for the Winchester Mystery House in California.

A quirky assortment of musical marvels from around the world.

A soon-to-be-forgotten roadside spectacle loaded with local lore.

The final resting place of two members of the infamous Doan gang, notorious outlaws and Revolutionary War Loyalists.

The ruined remains of a coal mining ghost town are hidden within the woods.

Steepest flood safety railway in the entire world.

This hidden gem of a garden has one of the only surviving Victorian ferneries in America.

This park contains a number of standing stones meant to heal and inspire.

A mine fire has been burning under the deserted town since 1962, but this church is still going strong.

The Home and murder site of the witch of Rehmeyers Hollow.

The oldest surviving botanic garden in the United States.

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.

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

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

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

A ruined mansion hidden in the woods of the Hudson Valley, home of a tragically doomed romance.

The fairy tale castle of the "fairy-tale king."

Quirky castle designed by the American actor best known for portraying Sherlock Holmes on stage.

The mysterious headstone of an unidentified bank robber was seen visited, every year, by a woman in black.