Nature

The Science and Nature Experience at San Francisco

Exploratorium

Founded by Frank Oppenheimer, the brother of J. Robert Oppenheimer and himself a physicist, the Exploratorium contains over 650 exhibits that can't be properly described - they have to be experienced.

Almost all are interactive and hands-on. There's the Tactile Dome, where you make your way along a dark maze entirely by feeling the walls made of various textures. There's a small 'experiment' in which you can find out what a tornado is like by feeling it. But far from focusing only on touch, this unusual 'museum' excites all the senses and the mind.