The ZR Hotels Group was established in 1990 in Krakow. Currently, the group owns three hotels in Krakow and its surroundings: Dwór in Tomaszowice, Zinar Castle, Forest Hotel, and two properties undergoing modernization: Wyspa Biskupia in Karlin and Pałac in Bobrk. The group also includes renowned restaurants: U Ziyada – Baszta Wzgórze Zamkowe and Nowy Spichlerz – Dwór in Tomaszowice. An important aspect of the group's activities is supporting art and culture, as well as promoting both local and international artists (painting and sculpture). The ZR Hotels Group is a patron of the arts and organizes regular exhibitions and meetings for artists in its facilities.

Zinar Castle opened from 10/11.2023, located on Castle Hill, is the latest investment of the ZR Hotels Group, which from the beginning has embraced immense respect for the identity of the place. The building dates back to the first half of the 20th century, and its modernization has been carried out with a deep appreciation for its historical fabric. Zinar Castle is a hotel where timeless design harmoniously blends with the nature and history of the location. The hotel features 34 rooms in a five-star standard, a spa with massage rooms (opening in Q3 2024), a two-level restaurant U ZIYADA with unique terraces and arcades, crowned by a breathtaking view of the panorama of Krakow, the Tatra Mountains, and the Vistula River. In Zinar Castle there is a two-story Ziyad restaurant. The upper level of the restaurant has direct access to the terraces. In this space, hotel guests can enjoy both a delicious breakfast and a wonderful view. The lower level of the restaurant has several rooms of different character where guests can taste dishes from the a'la carte menu.

Castle Hill, thanks to its location, offers unique opportunities for relaxation in Krakow. Convenient access: 10 km from Balice Airport, 5 km from the Krakow bypass, proximity to the city center, and at the same time, the surrounding Wolski Forest, views of the surrounding nature, and the proximity of tourist attractions (the Camaldolese Monastery, Kościuszko Mound, Srebrna Góra Vineyard, walking and cycling paths...) make it a place that allows you to experience multidimensional leisure.