The first of three, Blue Lagoon 1 is the most well-known, and so the most crowded. There is also a long zipline and is the most convenient - it is only a 20-minute ride from town. You can play volleyball nearby, and jump into the lagoon after. The water is cold but refreshing; in October to March, it is a beautiful turquoise blue. There is an entry fee of 10,000 kip (US$1.50).