Holidaying on the island has its benefits. Gotland offers everything from mile-long sandy beaches to small, hidden swimming holes. Here, you will also find a number of limestone quarries with turquoise, shimmering water. For those who like warmer swimming temperatures, the quarries are a particularly good choice as the temperature is often a degree or two warmer than the sea. The Blue Lagoon quarry is the most renowned, but there are so many more…