Historical attractions such as the Clementinum Library (with very limited daily capacity due to humidity quotas), as well as theatres, operas, experiences, tours, and popular restaurants and cafés, are often fully booked in advance — especially during peak tourist seasons. Without a reservation, it’s common to end up waiting in long lines outside or missing out completely.
Booking tickets ahead can also sometimes save you 30–60 minutes of waiting at the cash desk, for example, with skip-the-line tickets to Prague Castle, Prague Boats, Prague Zoo or the Old Town Hall.
For booking entrance tickets, skip-the-line passes, and experiences in Prague,
I recommend using GetYourGuide, it's the easiest way to plan and book everything in one place, on your phone or laptop.
I've hand-picked the top essentials in my Get Your Guide storefront that are best booked early, it's the simplest way to guarantee your spot and stay ahead of the crowds.