Worn books, aged leather, hidden paths, striking vistas, and displaced machinery- an accumulation of images from, inspired by, and relevant to the ages of Myst.

The Secret Door is essentially the digital equivalent of a linking book- one that only only takes you to places on Earth, anyway.

The site curates a series of particularly interesting locations via Google Earth, drops you down into them with no explanation, and invites you to explore.  Pretty rad.