3 nights in Prague then train to Budapest for 3 nights then a train to Vienna for 4
Any "must-do's"?
It is a very good museum in the old secret police headquarters. It details just what horrible cünts the commies were to everyone and for its grand finale you end up in the basement cells where they used to torture and hang people (that was where my wife burst into tears ) .
At the end, you emerge blinking into the daylight with a strong sense of how lucky you are.