The Passport to Explore Space card gives you benefits at multiple space museums and exhibitions across the country:

Passport to Explore Space holders receive special savings on admission, tours, food and retail at each location. Visit all 14 Visitor Center and space shuttle locations to complete your passport.

More at NASA visitor centers launch new passport for space tourists – collectSPACE.

Earth-bound space tourists hitting the road this summer to tour NASA’s historic launch pads and mission controls, as well as see the retired space shuttles on display, now have their own passport.

The “Passport to Explore Space” is now being offered by the official visitor centers for NASA’s nationwide facilities and the museums that display the space agency’s former orbiter fleet. Guests to the 14 locations in nine states can get the passports stamped with commemorative markers representing each of the centers, earning them offers and discounts in the process.