Fingal’s Cave

 From Ancient Origins:

This sea cave has been able to draw tourists to the deserted island for several reasons. Apart from being a geological marvel, Fingal’s Cave is also an important site in Irish legends. Another of the cave’s claims to fame is that, despite being in an uninhabited part of the world, it has been visited by a number of well-known figures over the centuries, and it even served as the inspiration for a concert overture. Fingal’s Cave has a height of about 22 m (72.18 ft.) and a depth of about 82 m (269.03 ft.). It has been speculated that Fingal’s Cave is over 50 million years old. As the island of Staffa is situated in an area of volcanic activity , Fingal’s Cave was created by lava flow. The cave is made up of three layers. The base consists of a layer of tuff and the top is composed of a layer of basaltic lava lacking a crystalline structure. In between these two layers are interlocking colonnades (perhaps as many as 40,000) of black fine-grained Tertiary basalt. (Read more.)