On a budget, Charles Bridge still earns its price.
Free
It is genuinely one of Europe's great pedestrian bridges — the statues, the towers, the river light are the real thing. The honest catch: from roughly 10am to 7pm it is a shoulder-to-shoulder crush of tour groups, caricaturists and trinket sellers, and you'll see more selfie sticks than statues. Come at dawn or after 10pm and it transforms completely.