We were impressed if not astonished by the high cascading waterfalls which connect 16 lakes formed by natural tufa – also known as travertine – barriers that grow from chemical and biological interactions among bacteria, blue-green algae and alkaline water hypersaturated with CO2. The lakes are filled by runoff from the mountains, and the water levels descend through the cascades from an altitude of 636 to 503 metres over a distance of 8 km. Impressive! Our group, setting aside age and orthopedic impediments, chose to hike the longer of the trails through beautiful beech forests just leafing out. We chose the perfect week to see the sun shining through the translucent light green leaves. Inspecting the ground from time to time we saw Lamium orvala, Polygonatum odorum, Asarum europaeum, Petasites albus, Valeriana
Leontodon, Anemonoides ranunculoides, Equisetum, a new orchid – Listera ovata, the common twayblade. Also: Corydalis bulbosum, Anemonella thalictroides, and a log covered with Oxalis acetosella. The rock wall at the trailhead had the parsley fern, Cryptogramma crispa, and we found Arum maculatum and Cruciata laevipes near the parking lot. Another night in our nice hotel.