And don't eat "cake" in a coffee shop while killing time waiting to head to the airport for your return flight !! Not the smartest thing I've ever done I can tell you
On a slightly more serious note, avoid Madam Tausaudes unless you really like that kind of thing, I seem to remember it was much like London. Over priced and a bit dull.
Most things are related to drug or sex, we found a sex museum that was interesting. Don't know if it's "The" sex museum or if there's more than one. Think it was down the main drag in front of the train station though. Right hand side.