Giant's Causeway Wonders

Giant's Causeway holds 40,000 interlocking basalt columns.

Giant's Causeway lies in County Antrim, Northern Ireland.

Most basalt columns are hexagonal with four to eight sides.

Tallest columns reach about 12 metres or 39 feet high.

Some columns look like a giant's boot after weathering.

The rock formed 50 to 60 million years ago in eruptions.

Lava cooling caused cracks forming the famous column shapes.

Giant's Causeway became a UNESCO World Heritage Site in 1986.

Nearly one million tourists visited the site in 2019.

Visitor centre opened in 2012 after the old one burnt down.

Giant's Causeway inspired a legend about giants building a causeway.

Seabirds like fulmar and petrel nest among the rocks here.

National Trust owns much of the Giant's Causeway area now.