If sun, sand and surf isn't your thing then consider a trip to this cave in Colonia Santeña, a small village of cattle farmers 7km northwest of Bocas town. Here you'll wade through waist-high water while trying not to disturb thousands of sleeping bats overhead. It's all over in about five minutes. The cave entrance, marked by a small shrine to the Virgin Mary, is along a short trail on the right along the road to Boca del Drago.
A round-trip taxi should cost about US$20 or you can take the Boca del Drago bus (US$2.50).