Due to its primary characteristics, such as heterogeneity, mobility, and flexibility, tourism is today a global phenomenon that can be divided into a large variety of specific forms. The term "cultural tourism" refers to various forms of tourism that, as the name suggests, originate from the words “culture“ and “tourism“. Culture is present on practically every trip, even though it is often not the main reason for the trip. The area of northwestern Croatia consists of five counties, and because of its location, it played a significant role in Croatian history. Due to its historical significance, this region has preserved not only a rich cultural heritage but also significant culture and customs. Compared to the Croatian coast, tourism in the northwest of the country is still relatively underdeveloped. The lack of accommodation capacity and the poorly developed tourism industry are the main reasons why this region attracted only slightly more than 2% of all tourists in certain previous periods at the national level. The northwestern region of Croatia is home to more than 100 castles. Most of them are in a damaged or neglected condition. Some of the modern renovated castles have a new function. A comparison is made between valorized and non-valorized castles and profane objects of architecture that are classified with the status, function, and role of castles precisely because of the similarity of the landscape and the abundance of castles in a limited area, and the used and unused potential of the total capacity is shown and the difference between preserved and non-preserved ones have presented examples of heritage and their legitimate use and presentation of the same as part of an integrated tourist offer. At the same time, some of the spaces serve as an illustration that not every castle has to be exclusively a museum to be attractive. Because of their significant potential, castles should be used everywhere in the bottom line. The key is to make the most of what already exists to create an attraction that could raise money for further restoration and valorization so that they can be used in an unrestored state. The platform run by the tourist boards and counties of northwestern Croatia would be of great help in the development of a well-known tourist destination and work on its recognition and the general increase in the competitiveness of each destination. purposes.