Visible trends in city tourism related to the development of sustainable tourism clearly imply an increase in the significance of green areas and the development of nature-based tourism. Natural areas in cities that ideally fit the assumptions of sustainable tourism are nature reserves—areas where protection of the valuable environment is a priority. This paper aims to highlight that nature reserves are green spots in cities that can be excellent sites for sustainable tourism. The choice of big cities was dictated by the fact that they have the highest requirement for recreational green spaces due to a high concentration of tourist traffic in historic city centres and a clearer need for sustainable forms of tourism. Sixteen nature reserves in five big Polish cities with a population of more than 100,000: Gdańsk, Łódź, Poznań, Toruń, and Warsaw were selected for the study. Field surveys were carried out in nature reserves to see whether basic tourism facilities providing information about nature, supporting education, and conservation of the natural environment existed in the publicly available areas of such reserves. The attractiveness of nature reserves to tourists and their suitability for developing sustainable tourism was evaluated through score-based valuation of the reserves. The valorisation index was used for a synthetic rating and classification of the reserves in terms of attractiveness. The results of surveys imply a possibility of using selected nature reserves in cities for developing sustainable forms of active tourism—in particular hiking and cycling, educational tourism and daily recreational activities of city residents. The sites in question can be regarded as attractive ecotourism products, and as such hold the potential to become a popular destination among tourists and eco-tourists in particular.

Wine tourism plays an important role in the development of the local economy but also in the promotion of Portuguese wines in Europe and the world. Enotourism is also a tool to achieve sustainable development through the promotion of wine producers and the preservation of the cultural landscape. At the same time, it can increase the living standards of the population, generating jobs and additional income. The main objective of the study was to present the level of development of wine tourism and to identify the benefits associated with its development in accordance with the concept of sustainable development. The study used qualitative and quantitative research. A spatial analysis of the determinants of demographic development and wine production based on diagnostic indicators was carried out using the Charvat and Schneider indexes. A correlation relationship was identified between the following diagnostic characteristics: wine production and wine tourism development, on the one hand, and tourism development and demography. The study identified problem areas, e.g., demographic regression and economic progression (based on wine production), and identified the relationship between wine production and wine tourism development and demographic development. The study area was the traditional European wine region of Douro wine region in Portugal. The UNESCO cultural landscape has been shaped by human activities over the centuries. An original research procedure was developed to diagnose the state of the LAUs and determine the impact of wine tourism on their development. The results of the research indicate that wine tourism is an example of tourism on the UNESCO trail, where production and consumption take place for the benefit of both tourists and entrepreneurs. Enotourism is also seen as an important source of income and an enabler of socio-economic development.

In Poland, apart from opencast mining, brown coal (lignite) was also mined by underground methods. This is related to glaciotectonic disturbances leading to deposition of Miocene coal in the form of folds (synclines and anticlines). The highest number of underground brown coal mines in the 19th century was recorded in western Poland. In northern Poland in the second half of the 19th century there were active underground brown coal mines in Piła Młyn. The study aims to present the environmental and socio-economic effects of discontinuing lignite mining. It is a unique example of cultural heritage and influences the tourist development of the region. To this end, historical topographic maps were used together with data from LIDAR (Light Detection and Ranging) laser scanning, available descriptions and scientific articles about coal mines. Information from the local inhabitants and representatives of the “BUKO” Association (the Association of Inhabitants and Enthusiasts of Piła nad Brdą “BUKO”) was also obtained. As shown by the results of the analyses, changes in the environment are manifested in terrain relief and highlight the location of former coal mines. Clear land subsidence is arranged in linear sequences and occurs as single landforms. Recesses at the former extraction sites are very distinct. The socio-economic effects observed include activity of the inhabitants and development of rural areas. The area also offers good prospects for tourism as a themed mining village attracts tourists and is a unique amenity in Poland. The subject matter of this article is also of importance from the standpoint of civil engineering since post-mining areas cannot be repurposed for residential development. Due to changes in the relief in this area in places other than those analyzed, scientific research will be conducted here, which will allow to answer other hypotheses (brown coal transport).