Wednesday, November 26, 2014

El Ventanón: an impressive natural bridge

Deze post in het Nederlands: Klik hier.

A fantastic vista through a natural window.


"El Ventanón" is a natural bridge carved into a limestone ridge. The geological origin must be sought into the fact that water streams often sink into gaps which are located close to the edge of a limestone plateau. When such a stream dissolves a lot of limestone it can form a short but very large cave. The "El Ventanón" bridge is what remains of the roof of such a cave. The stream literally flowed below the bridge. The bridge of "El Ventanón" has a length of 30 meters and a height of 20 meters and is several meters wide. On the left side of the bridge we have found some small caves, which is an additional indication of a solutional cavernous origin of this bridge.
This geological phenomenon is included in a local walking route called the PRC-BU 32, which starts at the Ojo Guareña cave. Part of his cave, with a total length of more than 110 kilometers (110,000 meters) of galleries is one of the longest caves of Spain, can also be visited as a show cave.