Parking in Prague can be quite expensive (at least by Czech standards), or you might struggle to find a space, especially during peak hours. And even if you find one, you might find that it is actually reserved or that there is another restriction. On the other hand, there are quite a few underground car parks that are definitely cheaper than leaving your car on the street and paying a meter fee. Even if you leave your car in a guarded parking place, don’t leave any valuable objects there. They might attract too much attention from potential thieves.