Deutsches Museum
The largest museum of technology and natural sciences in the world, with over 13 acres of exhibitions containing invaluable original machines and equipment, models and reconstructions, from classical mechanics to telecommunications, from a full-size reconstructed coal mine to space travel technology.
If you like anything technical in any way, this is the place to head for. You could spend a week in there easily. Great place for children, too!

Permanent exhibitions:
Aerospace Agriculture Altamira-Cave Amateur Radio Astronautics Astronomy Bridge Building Carriages and Bicycles Center for New Technologies Ceramics Chemistry Chronometry Computers Electrical Power Energy Technology Environment Geodesy |
Glass Hall of Fame History Deutsches Museum Hydraulic engineering Kid’s Kingdom Machine Components Machine Tools Marine Navigation Masterpieces Mathematical Gallery Mining Metallurgy Microelectronics Mineral Oil and Natural Gas Motor Vehicles Music |
Paper Pharmaceutics Physics Power Machinery Printing Railways Scientific Instruments Technical Toys Telecommunications Textile Technology Tunnel Construction Weights and Measures |