All Things GiantsThe Giant’s Causeway: Proof of Mythical Giants—or Just an Ancient Lava Flow in Ireland? Posted on September 2, 2025 by Administrator On the rugged northern coast of Ireland lies one of the most jaw-dropping landscapes on Earth: the Giant’s Causeway. Nearly 40,000 basalt columns, formed like puzzle pieces, march straight into the sea as if built by titanic hands. According to legend, the giant Fionn mac Cumhaill constructed this causeway to walk across the sea to Scotland and face his rival. The columns, some reaching 12 meters high, do indeed look like a massive stone road fit for giants.