Welcome Experience the true beauty of Crete! Come with us and feel the peacefulness and the wildness of nature. The Nature and Adventure Tourist Agency in Rethymno organizes three daily tours in the Sivritos area of Crete. Walking through St Antonio's Ravine. (Click here to see more ...) Cycling around the lake at Potami Dam where you will be fascinated by the variety of Cretan flora and fauna. (Click here to see more ...) Walk on Katsonisi Mountain at sunset to admire a magnificent Cretan sunset. (Click here to see more ...)