This abandoned seaside fortress is now simply an imposing ruin being taken back by nature.

A small museum in the Golden Triangle tells the story of the opium drug trade that gripped Northern Thailand.

One of the world's largest collections of rare medical texts and ephemera.

While many places make the claim, the Library of Congress says this restaurant is the birthplace of the hamburger.

A religious-themed park filled with folk art to bring biblical stories to life that fell into disrepair and now being restored.

Instruments, apparatus, and rare books all relating to chemistry and its related sciences.

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

The abandoned coal loading dock is a canvas for unsanctioned art.

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

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

A rare view of a preserved Victorian science museum.

Where America's first doomsday cult awaited the end of the world.

A layered tribute to the work of mosaicist Isaiah Zagar.

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

Celebrating an art form with a collection of puppets from all over the world.

An artificial tree in the University of Connecticut greenhouses holds a collection of orchids, mosses, and other tropical epiphytic plants.

A vast collection of rare books, manuscripts & extraordinary objects illustrating the history of medicine.

An abandoned Victorian-era mill in the middle of modern Manchester.

More than a century of radio history is told in these displays.

The 19th-century ruins hide deep in an overgrown forest.

An archival collection of over 2,200 case studies which includes human brain specimens and tumor specimens.

A cemetery with goat-horn bedecked gravestones.

Edgar Allan Poe's old dorm is now a shrine to the author's legacy.