Dyrhólaey

Dyrhólaey, formerly known by seamen as Cape Portland, is a small promontory located on the south coast of Iceland, not far from the village Vík. In fact, Dyrhólaey is the southernmost point in mainland Iceland. It was formerly an island of volcanic origin, which is also known by the Icelandic word eyja meaning island. The volcano erupted about 100 thousand years ago during the Pleistocene.

Source: Wikipedia