Step inside Lucy, the world's largest "elephant."

A former copper mine which became a truly unsuccessful prison.

This might just be the TARDIS of bookstores.

A wunderkammer hidden on the top floor of the Hartford statehouse.

Arlington Cemetery exhibit dedicated to death and grieving.

Current docking place of the SS United States, the fastest transatlantic ocean liner.

This little-known collection holds everything from "Dracula" notes, to the manuscript of "Ulysses," to the forged works of Shakespeare.

A museum dedicated to the strange and extravagant costumes and memorabilia of the mummers, a tradition older than Philadelphia itself.

The origin of this mechanical boy was a mystery until he revealed his maker by writing it in perfect cursive.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

The body of St. John Neumann and his collection of hundreds of relics, on display in a Philly church.

This museum boasts a bucket of teeth and tells the tale of a 20th-century dental circus.

A collection of haunted artifacts chronicles the career of the world's most famous paranormal investigators.

The intriguing personal collection of a professional demon-chaser.

A museum designed by and dedicated to P.T. Barnum in the town where he is buried.

A storefront museum in Asbury Park honoring the Jersey Shore’s deep history of mystery—including the Jersey Devil.

Whale bones, scrimshaw, and sperm oil make up just a part of this comprehensive collection of whaling history.

A decorated war pigeon stands guard in eternal taxidermied rest at his alma mater.

Mysterious 500-year-old tapestries depict a unicorn hunt.

The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.

A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

One of the last taxidermists in New York City.

Come for the pastrami, stay for the million-dollar art.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."