There is a lovely little walk on Slemish that should take between one and two hours to complete, depending on the weather and your pace.
The Estrada do Istmo connecting the islands of and in was initially built as a causeway.
Were the spectacular basalt columns formed through the rapid cooling of lava from an underwater volcano, or, as some may say, created by the legendary mythical Irish Giant Finn MacCool? It does everything automatically, you don't have to get out of the car which is really nice.