Secret Manor, a house full of legends, the least of which is the haunting of long-deceased ladies of pleasure.

European castle ruins in an American state park are actually the product of death and grief.

Once the tallest building in the world and the site of "the highest dinner ever held in New York" this building now holds the most expensive penthouse in the city.

Bar full of oddities, specimens, artifacts and homages to the great dime museums of the past.

Living trees form the structure of an open-air palace.

Visit this playground of waterfalls, caves and sinkholes.

Home to the "Circus" trees created by Axel Erlandson.

This naturally-sourced hot spring is now home to a clothing-optional resort.

A Texas-sized particle collider that was abandoned due to its Texas-sized budget.

The largest and most famous wax anatomical collection anywhere in the world.

Paris' fabled purveyor of exotic taxidermy and natural history curios.

Enormous piles of historically significant stones, dumped by Congress in a forest, and abandoned for 60 years.

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

An Escher-inspired library dedicated to the wonders of the human mind, yet closed to the public.

This small town in the Netherlands has no roads but instead, miles of canals and over 100 bridges.

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

Ruins of a Carnegie family mansion on Cumberland Island.

California's own medieval Italian castle, authentic down to the 300-year-old iron maiden in the dungeon.

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

Mirrors and glass shards cover every inch of this arrestingly beautiful mosque.

Read between the lines of the subway map to find the hidden abandoned Civil War fort.

London's smallest police station is barely the size of a phone booth.

A mysterious artist-run cabinet of curiosities and library.

This upscale streetwear store is hidden behind a fake Snapple machine in the back of a deli.