A "snorkeling destination" refers to a place where people can go snorkeling, which is a recreational activity that involves swimming on the water's surface while using a snorkel to breathe and observe underwater life. Full definition
These are the two most popular snorkeling destinations in Belize and it was fairly crowded with other boats and groups of snorkelers. (escapingabroad.com)
Along the way is Lumahai Beach (my favorite) and Tunnels, one of the islands best snorkeling destinations on Kauai. (parrishkauai.com)
The offshore islands of Vieques & Culebra are the best snorkeling destinations in Puerto Rico. (islandsofpuertorico.com)