It is famous for its stunning crystal-clear water, which cascades down the grotto walls.
The Crystal Waterfall is believed to have been formed over thousands of years.
The Emerald Grotto was discovered in the 1930s and opened to the public in 1956.
The grotto is known for its impressive stalactites and stalagmites, which have formed over centuries.
Visitors can take boat tours through the emerald-colored water and marvel at the Crystal Waterfall.