From the 16th century the Hospital of the Holy Ghost ("Heiliggeistspital") of the city of Rapperswil was located here, which from 1810 was a quarantine hospital, in Swiss German "Siechenhaus" which in ancient times was situation in Kempraten. Remains of the former abbey church (8th century) were found in 1964. The island has a small restaurant and a campsite. Tourist boat trips – run by the Zürichsee-Schifffahrtsgesellschaft – sail from Zürich and Rapperswil to the island of Ufenau only; to Lützelau there is a commercial "island taxi" service from Rapperswil between May and September. In 1927 the Ufenau and the Lützelau islands, as well as the so-called "Frauenwinkel" area at the Seedamm area towards Hurden were placed under conservation, being since 1993 a «Moorlandschaft von besonderer Schönheit und nationaler Bedeutung», i.e. a bog environment of extraordinary beauty and national importance. Swimming, camping and other leisure activities are permitted on Lützelau campsite, but forbidden on Ufnau, as well within the "Frauenwinkel" lake area.