This coastal landmark was never seen, but mentioned by Saul Tigh in the episode Water, when he saw screenshots of frozen water deposits on a nearby moon and promptly said, "Not exactly Caprica Beach down there, is it?".
This region was obviously on the coastline of a Caprican continent or other landmass (which one is unknown), and was probably a very popular and well-known tourist attraction and resort area frequented by tourists from all colonies before the Cylon attack. Activities most likely included tanning, swimming and aquatic sports.