The pandemic of the coronavirus, which the World Health Organization declared in March 2020, was an unprecedented situation in recent history. It encompassed all parts of the world and had a significant influence on the world economy. It has triggered global recession, disturbed supply chains, led to the loss of jobs and growing financial instabilities, changes in consumer habits, and had sped up the digital transformation of society. Tourism was one of the most endangered parts of the economy, which is especially important for Croatia due to the large share of tourism in GDP and employment. This thesis investigates the influence of the pandemic on tourism – especially adventure tourism in Croatia – and the consequences the pandemic had on the way agencies do business, but also on the habits of Croatian citizens regarding planning future travel. For this thesis, interviews were conducted with several Croatian travel agencies, and the Association of Croatian Travel Agencies, and a survey was conducted among Croatian citizens to research whether the pandemic affected their habits and attitudes regarding travel. The research has shown that the pandemic had an impact on future trends in tourism, which is important for travel agencies – they can direct their marketing activities in this direction. Adventure tourism is a type of tourism that gained popularity after the pandemic because it involves activities in the nature, which contributes to physical and mental health. Croatia has great opportunities for the development of such tourism, both in the continental and coastal areas, and those opportunities have not yet been sufficiently exploited.