brick cladding system
Southern Ohio Haunters Infinity Mirror MnT - Garage of Evil!!
Mechanical iris v2.0 by NTT
Here there be (friendly) witches
Love this optical illusion!
Knowing the Morse Code Alphabet could save your life in a disaster situation, check it out at http://survivalized.com/morse-code-alphabet/
Sample of numerals
I will teach my kids Roman Numerals because they don't teach it in school.