Rare recess caves fill this unbelievably beautiful Ohio park.

A slab of sandstone covered with mysterious 1,000-year-old rock carvings from a vanished North American culture.

The largest earthwork effigy in the world.

In the middle of a New England forest sit the crumbling ruins of World War II-era ammunition storage bunkers.

An anonymous art project beneath Longfellow Bridge where hundreds of trophies line the steel support beams.

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

A century-old historical movie theatre that plays a mix of independent and mainstream films.

Original factory of John G. Borden who started what we know today known as Borden Dairy.

This sculptural piece by the artist Tom Otterness doubles as a jungle gym.

This century-old independent movie theater with an iconic Art Deco neon sign survived a devastating fire in 2016.

Once the center of food production for this small town.

This sound-art installation features songs composed using only the Mid-Hudson Bridge as an instrument.

The poet Walt Whitman was a frequent visitor to this spot, the highest on Long Island.

Now a retreat center for the faithful, it once provided training for clergy—but it began as a farm owned by a famed financier and his opera singer wife, who built a surprise in the backyard.

Intact 125-year-old carpentry shop and Victorian house, along with cobblestone architecture structures.

A museum that houses a collection of stenography machines plus dozens of books, photographs, and guides to shorthand languages from around the world.

An impressive Sasquatch statue marks the spot of a fated Bigfoot encounter that changed a community.

This historic fort spans more the 300 years.

The famed poet was born in 1819 in a farmhouse built by his father.

This formerly abandoned amusement park includes a classic carousel and a replica of Mark Twain's famous hut-like Elmira study.

A century ago, aspiring socialites climbed on this cement beast with the hopes of marrying a millionaire.

These conical kilns measure an impressive 30 feet in diameter, and were once used to produce charcoal for a local blast furnace.

A unique work of art that was created without permission.

A restored Shell gas station from 1937 that includes a tow truck, the original gas pumps, and the original office.