Dror Bar-Natan's Image Gallery:Symmetry:Tilings:The 22* Group

Exploratorium bathroom tiles
Bathroom tiles at the San Francisco Exploratorium, May 2000. (Notice the optical illusion!)
Pentagonal bathroom tiles
Pentagonal bathroom tiles made by Wlodzimierz Kuperberg, seen at the Kuperberg-Zieve's, Davis July 2000.
Nicholas K. Zieve's shirt
A design on Nicholas K. Zieve's shirt, July 2000.
Kyoto Kuramaguchi Station
Wall tiles in the Kyoto Kuramaguchi Subway Station, September 2001

A plastic bag

The quotient orbifold for the group 22* is a disk with two order 2 corners and a reflecting boundary - that is, a plastic bag.