High Quality Content by WIKIPEDIA articles! The Gruta das Torres (Portuguese: Grottoe of Towers), is a lava cave, a geological formation of volcanic origin formed from the flow and cooling of subterranean magma rivers. This formation is located outside the parish of Criacao Velha, in the municipality of Madalena, on the western flanks of the island of Pico. The cave system formed from a series of pahoehoe lava flows which originating from the Cabeco Bravo parasitic cone about 500 to 1500 years ago. The caves are a group of interconnected lava tubes between 0.5–22 metres (2–72 ft) width, created from both pahoehoe and aa types of lavas generated during different geological periods. It has a height between 1.1 and 15 metres (3.6–49 ft) and is located at an elevation of300 metres (980 ft). With an estimated length of over 5.2 km (3.2 mi) it is the longest lava cave in the Azores. Access to the cave was managed by the Mountaineering Association ("Os Montanheiros” – Nucleo da Ilha do...

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