Petrin is worth a visit. At the bottom there's the
fading man statue, the
funicular railway takes you up, at the top there's a
rose garden, a
park for picnics, a
great view of Kampa and the Old Town from a little-known spot in front of the Strahovsky monastery, a
mirror labyrinth, the 'rozhledna', Prague's very own
Eiffel Tower (approx the same height if you include the hill underneath) and, best of all, a
free exhibition in the tower's basement dedicated to Jara Cimrman, the Czech Republic's favourite historical character who... wait for it... never existed. A fictional character. They must have had so much fun putting the exhibtion together.
http://www.prague.net/blog/article/25/museum-...The place to eat is
Cafe Louvre (
http://www.cafelouvre.cz/en/) which does plenty of Czech food but also has a cheap lunchtime menu.
Off the beaten track are the
sculptures of
enfant terrible David Cerny including the giant car-sized babies crawling up the tv tower, the upside-down horse hanging from the roof of the Luzerna Pasaz (just off Vaclavske namesti) and the peeing men statue outside the Kafka Museum in Kampa. Two men pee onto a map of the Czech Republic, there's even a telephone number on the floor next to it and they'll pee out a message for you.
I'll post any more ideas I have.