The Manavgat River is famous for being the longest underground river in the world which contains the largest amount of water supplied from only one source. Species of fish and birds, such as trout, carp, ducks and geese, and for this reason, the river is now famous for its day trips with tourist boats that start from the center of Manavgat through the waterfall and then to the end of the river, and those who want to swim can choose between swimming in the river or snorkeling in The sea, the waters of the Manavgat River are very cold, but the water that ends up in the sea is much warmer and suitable for swimming.