Neaby beaches, Playa Rogelio, Playa Magante,
Horse riding from the adjacent farm,
Climb the foothills overlooking New Cambium,
Rio San Juan and beaches, Playa Los Mino, Playa Caleton, Playa Grande (World Class Golf as well as public beach). List of 9 things to do in Rio San Juan (15 mins away by car) here.
Snorkel from boats at Laguna Gri Gri and see the mangrove wildlife. Scuba dive from here too.
Visit the caves and swim in the cenote.
Further east, Playa El Breton, Playa Diamante
Overnight (best) or early start one day trips
Take a boat from Sanchez across Samana Bay to Parc Nacional Los Haitises, stay in the park in small huts.
Visit Las Terrenas, ride horses to the falls and swim. Stay in Punta Bonita, visit Playa Moron, Samana for whale watching. Great sea front restaurants.