An interpretive center offers exhibition, research, classroom and curatorial space for the study of ideas and materials related to rock art, the Center’s architectural strength come from it geometry and creative use of dark purple black copper slag encrusted concrete panels and weathered steel trellises. Mysterious and timeless, it is ‘tuff’ and sensuous architecture built on subtle nuance. The building’s ‘stealth’ form, sited at the juncture of the Adobe Mountain Dam and the Hedgpeth Mountain geologic formation, literally spans across the earthen dam’s concrete outlet works. The funnel like, boomerang shaped plan geometry serves as a metaphorical ‘time machine’ taking the visitor from the surrounding suburban sprawl of Phoenix to a desert sanctuary where a trail leads visitors to over 1500 petro glyphs dating the Hohokam culture of from 900-1100 AD.