This site is mostly stereo 3-D images.
They were made using POV-Ray.
If you can "freeview" you'll see them in 3-D
It's like looking at "Magic Eye" pictures only more so.

Have a look, try "floating" the two images together ... enjoy!

Choose either the parallel or cross-eyed views ... dive in!!
Generally, parallel pairs are easier for short-sighted people, cross-eyed views are easier for the long-sighted.