There are several 'museums' with displays of amber and larimar, cigars, information about the process, etc. Ultimately they are glorified souvenir shops but the chocolate one is supposed to be good.
Punta Cana, Dominican Republic - ChocoMuseo - Chocolate for the world
Nearby is the sand sculpture exhibition and a "Taino museum" but I suspect they are little more than tourist traps.
Other natural attractions as well as the Ojos Ind?genas:
Laguna de B?varo (near Cabeza de Toro)
Hoyo Azul (Cap Cana)
Cabo Enga?o - the country's easternmost point
Excursions - Boat Fiesta, Buccaneers, Dolphin Explorer, Dr Fish Ocean Spa.