This highly detailed site contains International Space Station models, international satellites, capsule models from Russia, America, and other countries, and of course, space shuttle models, including reference documents to individual missions. Models include different external tank configurations, crawler transporter and mobile launch pads, and even the 747 jumbo jet carrier shown below.
This site is great for everyone interested the shuttle program, with bits about the crews, histories, mission goals, and payloads from various missions, from test flights from the '70s to present. When I get back, I'm planning to build a model to commemorate my trip. Man, this should be fun! I'll post about the experience when I get back. Have a great Independence Day!