From pink dolphins to underwater cities, this museum explores the unseen, mythical world of the Amazon river.

This whimsically unique butterfly farm focuses solely on creating habitats for the gentle insects.

This Philly landmark has a giant butterfly pavilion, three floors of insect displays, and withstood a $40,000 heist.

A phenomenal assembly of pueblos in New Mexico is the most complete example of ancient ruins north of the border.

One of the first amphibian migration tunnels in the United States encourages a tradition that has inspired Amherst residents for decades.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

The world's largest kaleidoscope, designed by a 1960s psychedelic artist.

A small Second Empire-style building is one of only seven remaining lighthouses on the Hudson River.

Take a steam-powered ride straight out of the past on this Appalachian rail line.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

The enormous 250-room Vanderbilt mansion conceals hidden doors and secret passageways.

The graffitied ruins stand hidden within the Pennsylvania woods.

An abandoned amusement park hints at the twisted history of the Newfoundland Railway.

Utopia and nostalgia mingle at the site of Bronson Alcott's ill-fated agrarian commune.

A home decorated by its owner with eye-catching and captivating assemblages of found objects

Beautiful steampunk ghosts of early Massachusetts.

This cave was once thought to be a hiding place for the devil.

Toy museum in a former tavern is the expression of one man's life pursuit of the aesthetic power of cartoon imagery.

Sculptures, jams, and the wild west collide at this folksy retreat.

Industrial ruin decimated this tiny New England company town in a fashion no one saw coming… and even fewer remember today.

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

A classic roadside attraction on Vermont's historic Route 5.

Cryptid lake monster honored with its own monument.

This historic folk museum celebrates the attention to detail that makes America great.