Just north of the city center, you'll find the sprawling Prague Exhibition Grounds, a fantastic place to spend an afternoon. Originally built for the 1891 World's Fair, the area blends historic Art Nouveau architecture, like the grand Industrial Palace, with open park spaces perfect for a stroll or picnic. It's a lively hub for all sorts of cultural events, concerts, and festivals, especially in the summer, but there's always something to see, including an aquarium and various sports facilities. General admission to the grounds is free, making it an easy and relaxing escape.