Natural pool in the Enchanted Valley in Alto Caparaó, Zona da Mata Mineira. Formed by José Pedro River, with several rapids, waterfalls and natural pools. It is 400 m after the camping Tronqueira, track starting point for the Pico da Bandeira.
The Trulli houses of Alberobello in the Puglia region of Italy were built by settlers from limestone and not much else. An impressive dry stone building technique meant the houses could be collapsed simply by pulling out a keystone.