"Northern Lights Tile". Tiles appear black at room temp, but move through the color spectrum when the temperature changes.
21 DIY Gym Equipment Projects to Make at Home http://fitmediaconcepts.blogspot.com/
Some nice facilities here to look at for training. I'd love to work and workout in all these places
Photographer uses long exposure shot to recreate the Batman symbol. Gotta Love Batman!!!
Rogue Workout Facilities...id Love to run an outdoor facility like this!!!