One of the few remaining carousels built by master amusement park carver Charles I.D. Looff.

Naturally formed white marble arch housed in an abandoned marble quarry from the 1800s.

The dairy farm in upstate New York where nearly half a million people gathered for three days of peace and music in 1969.

The remains of a community that was forced to move for a dam that never materialized still rot in this Pennsylvania park.

In which a local geological marvel becomes a quaint roadside attraction.

A failed piece of Orientalism has become the proud symbol of a community.

The life of one of FDR's possible mistresses is preserved in her palatial Hudson Valley mansion.

What was once a trend-setting, phrase-coining icon of architectural splendor is now a rotting, forgotten hulk.

These mystical miniature houses bring a touch of magic to the New Jersey woods.

The remains of the furnace and iron works that produced the massive Hudson River Chain still stand in the woods of New York.

The remnants of a 19th-century ironmaking complex hidden in the woods of Connecticut.

A 19th century hat factory still stands as a crumbling ruin in upstate New York.

Mysterious rocks that ring musically when struck.

The internal railway of one of the biggest steel plants in America has been transformed into a linear park with unique industrial views.

This ominously named New Jersey street seems to be attracting over-the-top legends of its own making.

The largest collection of Frazetta originals in the world.

Tucked behind New Jersey's abandoned Gingerbread Castle lie the eerie ruins of a once-flourishing paper mill.

Once in a state of dilapidation, this candy-inspired fortress is now being revived.

The highest point in New Jersey is marked by a massive, if simply named, obelisk.

This abandoned factory on the Hudson River once churned out a million bricks a week.

A winding, cliffside stretch of road overlooking the Delaware River.

In the power of this waterfall, Alexander Hamilton saw the potential for industry.

Historic town settled in the 19th century because of its convenient location along a popular coal transport route.

This forlorn park is the result of a failed investment turned tax dodge.