Exploratorium Participatory Museum - Interactive art and science exhibits.
Guggenheim Museums - This site includes all four Guggenheim museums, those in New York and Venice.
The Kemper Museum of Contemporary Art & Design - Quality images from both their permanent collections and their temporary collections fill this site. Works include those by Frank Stella, Nancy Graves, and Georgia O'Keefe.
Miami Museum of Science - with online educational science resources.
Musée du Louvre - one of the most famous art museums in the world. It has beautiful pictures you can view, interesting information about the artists and a tour of Paris.
Museum of Paleontology at the University of California - Interested in dinosaurs and other prehistoric animals or plants? This is THE place!
National Air and Space Museum (NASM) - Smithsonian Institution's National Air and Space Museum maintains the largest collection of historic air and spacecraft in the world.
Smithsonian Institution
United States Holocaust Memorial Museum