A collection of objects supposedly singed by the hands of souls in purgatory.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.

A treasure trove of Renaissance-era funerary art in a Roman church built on top of Nero's grave.

Architectureal fantasy quarter of Rome.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

Giant, pink stuffed rabbit on an Italian mountain.

For a brief time in 1960s France, families could climb into a tiny submarine and be pulled along an underwater journey.

For centuries no one knew there were hundreds of bones and precious artwork hidden beneath this Swiss church.

Sleep snuggled in a sphere suspended atop the forest canopy of Vancouver Island.

This tiny hotel perched atop a 50-foot tower really puts things into perspective.

Stay at this storybook estate, featuring Sir Henry Hudson Kitson's masterpiece "Gingerbread House."

A whimsical village of unique treehouses resides in a Washington forest.

A hotel and restaurant serving as the mecca of kitsch.

San Francisco's most expensive hotel suite includes a secret passageway rumored to have been used by JFK.

This odd Chilean waterfall-cano hotel must be entered via a rope bridge.

An eclectic trailer park retreat in the middle of the California desert.

A series of modernist treehouse hotel rooms grace the outskirts of an Arctic forest.

Stay in a room with a view... of the bottom of the ocean.

Spend the night inside a two-story elephant villa.

Frequent fliers welcome in this airplane hotel.

A floating underwater hotel, created by a Swedish artist.

One woman's dream became a train hotel in her backyard.

The control tower at the historic weapons range is now available as a highly unusual vacation rental.