Moll's Gap is on the Ring of Kerry route, and offers views of the MacGillycuddy's Reeks mountains, and is a popular tourist location. The rocks at Moll's gap are formed of Old Red Sandstone, which are small quartz grains laid down over 350 million years ago; unlike most of the Old Red Sandstone around Killarney which is stained red by iron oxide, the rock at Moll's gap is stained green by chlorite. Moll's Gap is named after Moll Kissane, who ran a shebeen (an unlicensed public house) in the 1820s, while the road was under construction.