The Kraków office of the national Polish Tourism and Sightseeing Society (PTTK), which dates back to the early 20th century. These folks can help you with information about almost any destination in Poland and have the resources to organise almost trip you want. Offering guided tours of Kraków, they are especially good at handling groups and organising tours to destinations nearby, like Ojców, the Jura Upland or the Tatra Mountains.