Petřín is the wooded hill on the left bank, rising about 130 metres above the river, and the steel tower on its summit went up in four months in 1891. Members of the Czech Tourists' Club had visited the Paris exposition two years earlier, come home impressed, and raised the money for a lattice tower at roughly a fifth of the Eiffel Tower's scale. The slope beneath it carries older things: orchards, rose gardens, a Baroque church, a funicular railway, and the Hunger Wall — a fortification Charles IV had built across the hill in the early 1360s, whose name comes from the famine relief the work provided.
The 299 steps inside the tower spiral tightly around a lift shaft, and the platform at the top gives one of the widest views in Prague, taking in everything at once: the castle strung along its ridge, the whole spired Old Town, the river bending through it, and on a clear day the hills of Bohemia beyond. Below, the hill is a park the city treats as its own. In spring the orchards flower and half of Prague lies on the grass.