One of the most spectacular basalt formations on the planet is located on the northeast coast of the island, in Northern Ireland. The Giant's Causeway is made up of 40,000 basalt columns formed by volcanic eruption since 60 million years ago. The columns raise twelve feet high and although most of them are hexagonal, there also are five, seven and eight sides columns.

These columns are grouped into three natural platforms, called large, medium and small Causeway, although some groups of columns have been named with some popular names like the Wishing Chair, the Fan or the Chimney, among others.

The incredible symmetry and perfect coupling between the columns gives the place a magic touch with a lot of stories. The legend about its formation is as follows:

With some variations depending on who tells it, the legend says that an Irish giant, Finn McCool built this causeway to cross the sea to Scotland, in order to defeat another Scottish giant, called Fingal.

He crossed the sea and arrived to Fingal's home, but it found that it was larger and more fierce than he had imagined, so McCool fled back to Ireland and his wife Oonagh hid him in a crib. Fingal also crossed the causeway chasing McCool. When he arrived to McCool's home, Oonagh invited him to tea, asking do not wake the baby. Fingal was panicked not wanting to face the father of the huge creature. He returned to Scotland destroying part of the causeway.

This fantastic area was recognized as a UNESCO World Heritage Site and, nearby, there are great beaches, headlands and caves.