Local tourists having a picnic in a shed by the river (NEL ANDRADE/MANILA BULLETIN). At the DOMSA (Don Mariano Santos Ave.) Spring and PicnicPark, located in Sitio Labahan in Barangay San Isidro, one can enjoy an early morning or early afternoon picnic in bamboo cottages by the side of a river ... Tricycles can be hired for a special trip to the park ... .