I recently went to Pianguita, a beach site on the "litte Africa" Pacific Coast of Colombia, and it was a very enjoyable experience. We played in the waves, partook in games on the beach (I even got to teach Ultimate Frisbee to interested players), learned about the ever-changing tides (The posts below were the soccer goal earlier in the evening), witnessed all sorts of impressive jungle wildlife (including the featured tarantula and huge Conga ant, which can kill you!), made lots of young friends, and swallowed about 4 tons of salt water.
Alas, my time at the beach is now over, and I'm busy writing papers and taking final exams. :-(