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Photo of Pinnacle Rock

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This weird formation is well-named, pointing directly upward. It's the one geological formation that interests virtually every visitor. It is comprised of a soft volcanic material, easily eroded, that has resulted in the unusual shape. Before the erosion it was a "tuff cone" which results from hardening and compaction of volcanic ash into "tuff". Many tuff cones dot the Galapagos landscape but none as eroded as Pinnacle Rock.

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Learn about Pinnacle Rock natural history

"...probably the most famous (and most photographed) landmark in the Galapagos..."
Barry Boyce on Pinnacle Rock A Traveler's Guide to the Galapagos Islands 1994

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