Where is the Museum of Communism in Prague? On Irony Street.
"It is in the center of the main shopping district.... If you have found McDonald's then you have found us. As you are facing McDonald's, enter the passage directly on the right of McDonald's and proceed up the first stairs you encounter on the right. We are above the McDonald's and next to the Casino."
(Hat tip to Eric Rauchway at Open University, where there's a good joke in the comments.)