Crisis management is a great challenge for managers, who approach different crises in different ways, which often results in minor but also very large deviations from the principles of crisis management. The global crisis caused by the Covid-19 pandemic, which began in late 2019 and continued throughout 2020 and 2021, was quite unexpected and the world was unfortunately completely unprepared and extremely vulnerable at all levels. Despite all the efforts of the government, the health and scientific research system, so far relatively little has been possible to influence the course and duration of the crisis. The pandemic has left behind damage and consequences that humanity will have to fight for a very long time. By restricting the operation of service facilities, imposing restrictions on public transport and gathering of people, banning people from traveling across state borders and other measures, states sought to curb the rapid spread of the virus and save the health and economic system from collapse. Due to these and other measures, tourism has faced major problems and major changes as demand has begun to behave differently when it comes to tourism trends and demands on service providers. It is known that millions of people from all over the world visit Croatia during the year and enjoy its natural beauty, so, primarily due to the country's strong economic dependence on tourism, the focus of this crisis is exactly what is happening in tourism. Therefore, in this paper we want to study what features are present in the current crisis and what was the impact on the protected area, specifically how it all affected the business and management of the Public Institution National Park Mljet. We want to get a closer look at how the Public Institution reacted to the whole situation and how much impact it had on the business of the Mljet National Park itself and whether there were significant changes.