On a budget, skip Žižkov TV Tower — the spend outweighs the payoff.
Observation deck ~300 CZK
Prague's strangest landmark — brutalist rocket meets giant faceless babies — and the deck gives the only truly high, all-round view of the whole city. The catch: it's away from the centre in gritty-cool Žižkov, the deck ticket isn't cheap, and many find the view 'nice but not magical' since you can't see the tower you're standing in. Polarising on purpose.