The Casa de Osambela (also called Casa de Oquendo) is the tallest surviving colonial-era house in Lima — a five-storey mansion built around 1805 by a Spanish merchant, with an octagonal mirador turret on the roof that was supposedly used to scan for arriving ships at Callao. Its eclectic balconies, painted patio, and grand wooden staircase are among the finest in the city.
The house is now owned by the Peruvian government and used for cultural events; it can be visited as part of city walking tours, though casual visits depend on whether something is happening that day. A few of the rooms preserve original furniture; the rooftop turret view is the highlight.