Five mythical trolls have taken up residence in woods and hidden on paths at the Coastal Maine Botanical Gardens.

This 19th century granite fortification is one of the most well preserved forts in New England.

This architectural onion has an original 1930's Jerry O'Mahony dining car at its core.

Admire an ever-changing landscape of stone sculptures.

Featuring a Loretta Lynn display and a re-created coal mine exhibit.

This boulder stays on its mountain thanks to a huge chain and on the map due to local legend.

Eight rare Corvettes are swallowed up by a sinkhole in Kentucky's National Corvette Museum.

Kentucky, Tennessee, and Virginia meet at this point in the Cumberland Gap.

An enormous natural sandstone bridge in Kentucky.

This modern castle sat empty for decades before a fire inspired its builders to complete its luxury halls.

Moonbows over Kentucky.

Prehistoric animals decorate this popular outdoor park.

The world's longest known cave system.

Cheap art and political theater in Vermont.

This "common-as-dirt" museum celebrates the glory of normalcy.

Hidden among the trees at the Rangeley Lakes Trails Center are more than 20 gnomes in small wooden houses.

This once luxurious Catskills resort is now a haunting ruin.

A 19th-century subterranean reservoir repurposed as a contemporary art cave.

The steepest classic funicular in the world glides along a dizzying incline.

This former theme park in New York's Adirondack Mountains fell into ruin before being resurrected as a state-run campground

NYC's legendary underground network for bovine transportation.

A Bed-Stuy gymnasium that hosts expansive raves, performances, dance parties, and more.

A band of aerialists and circus performers putting on incredible shows in East Williamsburg.

These World War I shooting range tunnels are now haunted halls of underground graffiti accessed through the roots of a tree.