Probably the most popular form of recreation with foreign visitors to Honduras [1], in terms of absolute numbers, is scuba diving and snorkeling on the Bay Island reef system. The diving around the three main islands and countless cays is unquestionably world-class, rated by some as the finest in the western hemisphere.
Another advantage to diving the Bay Islands [2] is the extremely low cost of certification courses and dive packages. Utila [3] in particular has become a mecca for budget travelers looking for inexpensive explorations of the underwater world.
Links:
[1] http://www.moon.com/destinations/honduras
[2] http://www.moon.com/destinations/honduras/the-bay-islands
[3] http://www.moon.com/destinations/honduras/the-bay-islands/utila