San Juan Botanical Garden has more than 200 species of tropical and subtropical vegetation, and it is the Universidad de Puerto Rico's main attraction. Stroll around the lotus lagoon, walk along the bamboo promenade and admire the orchid and palm gardens.

It was built on a site of a Jesus college. It was a foundation, set up by clerics from Madrid's Royal Monastery (Monasterio de la Visitación), under the patronage of the princes Carlos María Isidro de Borbón and his wife, María de Asís de Braganza y Borbón. The monastery was built in neoclassical style, between 1826 and 1832. On the outside, the facade is made from black and red marble, featuring the shields of Spain and Portugal, Saint Charles Borromeo, Saint Jane of Chantal and Saint Francis of Assisi. Inside the church, built in the shape of a Latin cross, there is an interesting collection of religious paintings by the Court painter, Vicente López and his school (Valencia)

At the northeastern tip of Öland, by the gate to Trollskogen (Troll Forest) nature reserve, you'll find Trollskogen nature centre. Many of the forest's trees are ancient, aged between 100–200 years. Crooked pine trees, sculpted by the winds from the sea, contort in imaginative forms. Here, you'll also find spruce and venerable oaks.