Cave swimming
From Openwaterpedia
noun - Cave swimming is a type of expedition swimming or wild swimming inside natural caves along the coastline.
Uaimh an tSolais & Uaimh na nÉan[edit]
Uaimh an tSolais & Uaimh na nÉan (Cave of the Light & Cave of the Birds) is a short film by Sam Krohn with Donal Buckley that was shot in one take on the Copper Coast along Tramore Bay on the southern coast of Ireland.
Dogashima Cave Swimming in Japan[edit]
Cave swimming expedition led by Masayuki Moriya of Ocean Navi in Izu Peninsula, Japan