Eighteen miniature death-scene dioramas.

Crammed into a Baltimore row house is an oddities shop that sells everything from skulls to dead insects.

This once-palatial plantation may have been the site where a draft of the Declaration of Independence was written.

An intricately designed junk art house with four extravagant junk art cars hidden in the suburbs.

It's not hard to see why the historic Peabody Conservatory of Music's library has been described as a "cathedral of books."

This brick-lined pedestrian walkway was once a railway tunnel used during the Civil War.

The opulent home that inspired Tintin's Marlinspike Hall and the adventures within.

Miles of man-made caves and tunnels are currently used for cultivating mushrooms.

Hundreds of secret cabinets built into the walls of legendary poisoner's private work room.

Limestone grottoes turns everyday objects into stone.

This whimsical castle of grottoes was the labor of love of a French postman, and one of the greatest achievements of outsider architecture.

The great Italian Renaissance painter was laid to rest here in the Chapel of Saint-Hubert.