Museu do Açude, Art museum in Alto da Boa Vista, Brazil

Museu do Açude occupies four buildings on a 151,132 m² estate on Estrada do Açude in Alto da Boa Vista, inside Tijuca Forest. The main house holds Oriental art, Portuguese azulejo panels and applied arts, with a reconstructed kitchen and dining room on the first floor and a visible technical reserve upstairs. The reception pavilion shows the exhibition Retratos de Raymundo, and the gardens hold the open-air Circuito de Arte Contemporânea.

Industrial entrepreneur Raymundo Ottoni de Castro Maya acquired the property in 1913 and later bequeathed it to his foundation, leading to the museum's opening in 1964. The collection grew over decades through strategic purchases and donations that reflected diverse artistic traditions.

The museum's name refers to the reservoir (açude) on the estate. Since the 1990s it has followed an integral-heritage approach, pairing its cultural collections with the surrounding Tijuca Forest. The gardens host open-air dance, music and theatre performances, and the site served as the exterior of the widow Porcina's mansion in the telenovela Roque Santeiro.

The property sits within a forest area, so visitors should bring comfortable shoes and water to manage the paths between buildings. Plan enough time to explore the scattered collections and outdoor spaces without rushing through them.

The open-air Contemporary Art Circuit, created in 1999, holds permanent installations by Hélio Oiticica, Lygia Pape, Anna Maria Maiolino, Nuno Ramos and others; works by Angelo Venosa, José Resende and Waltercio Caldas were added in 2016. The museum presents it as the largest open-air contemporary art gallery in Rio de Janeiro.