Wroclaw

Wroclaw hands you a full day of sightseeing for nothing: the bronze dwarf hunt is a self-guided walking tour with over 900 figurines that drags you past most of the central sights at zero cost, and the tourist office gives out free maps marking known locations if a phone-free version is preferred. The whole atmospheric core is free to wander too, from the vast Market Square (Rynek) and its gothic Old Town Hall to Ostrow Tumski, the oldest part of the city, whose lanes are still lit by hand each evening, and you can stroll the grounds around the UNESCO-listed Centennial Hall without paying admission. When you do want a roof over your head, time it for a Saturday, when the National Museum opens its permanent exhibitions for free; the 360-degree Raclawice Panorama is a paid ticket but a fair one, and it bundles entry to the National Museum, the Ethnographic Museum and the Pavilion of the Four Domes for a few months. Shoulder season, roughly April to May or September, is the budget sweet spot: mild weather, thinner crowds and cheaper beds than the summer peak. Cheap trains make Wroclaw an easy add-on to a Polish loop through Poznan and Krakow, or a stepping stone toward Prague and Dresden across the border.