“What’s Mine is Yours”, the popular book by Rachel Botsmann and Roo Rogers has become the slogan of the so-called Share Economy, which boosts since a couple of years. The main impact of the Share Economy-movement in tourism lays in the accommodation sector. Sharing websites like couchsurfing.org or airbnb.com offer not only overnight stays for free or at affordable prices, but promise a new, authentic experience to visitors of urban areas. The leading research questions: • Who participates in the tourism share economy? • “What are the motivations and expectations behind the offer and usage of shared accommodations? • What experiences have been made? will be treated on the basis of various quantitative and qualitative empirical surveys in two different urban settings: Berlin, as an example for an international metropolitan tourism destination and Trier, as a case study for a smaller city with a stronger focus on the domestic market and a main target group oriented towards traditional cultural tourism. The aim of the article is not only to contribute to the question, what collaborative consumption in tourism means for the so-called explorer-tourists searching for authentic experiences off the beaten track and outside the tourist bubble. More globally, the future role of sharing in tourism as well as the question raised by Trivett et al. (2013) on its impact on the traditional tourism industry and the future of travel will be analysed.