For a breath of fresh air and a chance to exercise your legs, head to Petrín Hill, one of the largest green spaces in the city. Attractions here include the Rose Garden, or rosarium, at the top of the hill, Nebozízek Garden, the Mirror Maze (a labyrinth), and the Seminary Garden, which boasts more than 2,100 fruit trees. The area has been in use since at least since the 12th century, serving as an execution site, vineyards and farming lands through the centuries.

Over the years, the land was divided into various gardens. One of the more famous attractions in the park is the Petrín Observation Tower, which was built in 1891 and resembles a small Eiffel Tower. Head up its 299 steps to the top for amazing views overlooking the entire city, and on clear days, most of Bohemia. Recent travelers say it's best to visit on clear days if you're only interested in the views and recommend taking the funicular up, then walking back down.

There are numerous ways to get to the park. You can head to tram stop Ujezd (from trams 9, 12, 20 or 22), then take the funicular up the hill or walk up. The funicular, which runs from 9 a.m. to around 11:30  p.m. year-round, uses the same tickets as the rest of the Prague public transportation system. Expect the ride to take about 4 minutes. While it is free to enter the park, some of the attractions charge a modest fee.