I've been on it several times and jeannieb gave great advice. The captain, designer, builder and owner is Dennis Abrahams aka Shabba. It's best to inquire at Eggy's. It ONLY goes out on very calm days, sometimes not for ten days. It's well worth going, so if it's a nice day, go for it as you might not get another chance. It's usually late afternoon but get your info from Captain Dennis at 876-435-3779. Last year it was $20US, you got one free drink to start and you can buy more with the prices very reasonable. The tour lasts maybe 2 1/2 hours or so with stops for swimming. The boat is fully stocked with life jackets. I had been going to Treasure Beach for years and never knew about the many caves along the coast.