Welcome to the Atlas Obscura, a compendium of this age's wonders, curiosities, and esoterica. The Atlas Obscura is a collaborative project with the goal of cataloging all of the singular, eccentric, bizarre, fantastical, and strange out-of-the-way places that get left out of traditional travel guidebooks and are ignored by the average tourist. If you're looking for miniature cities, glass flowers, books bound in human skin, gigantic flaming holes in the ground, phallological museums, bone churches, balancing pagodas, or homes built entirely out of paper, the Atlas Obscura is where you'll find them.
TDG readers will probably enjoy sections such as "Incredible Ruins" (Baalbek, Gobekli Tepe etc), "Relics and Reliquaries" and "Instruments of Science" (HAARP, Tesla Coils etc) - topics can be browsed on the right hand side of the page. Found via the always fascinating Boing Boing.