The Chocolate House (Casa de Chocolate) is a small octagonal pavilion on the edge of Plaza de España, built in the late eighteenth century as part of the Spanish governor's complex. It was used as a kind of afternoon salon: the governor's wife received guests here and served them chocolate, a drink that the Spanish had brought to Guam from Mexico via the Manila galleon trade.
The building is one of the very few intact Spanish colonial structures left on the island. It is open to the outside on all sides, with low arches between slim columns and a slate-grey roof. Combine with the plaza, the bridge and the cathedral — they are all within a five-minute walk.