If you intend to go back to the roots, you might be interested in visiting the Historical Technical Museum in Peenemünde:
http://www.peenemuende.de/en/gallery/Part of the rocket and space technology was developped at Peenemünde in the early 1940s, and some of the technical staff of the US space program came from there after WWII.
The location of the actual launch facilities (late 1930s, and early 1940s) on
a small island in the Baltic See, however, isn't (easily) accessible for the public, in general.