Cerro Otto is a mountain located 5 kilometres (3.1 mi) from San Carlos de Bariloche, and inside the Nahuel Huapí National Park, in Patagonia, Argentina.

There is a gravel road which allows people to bike, hike or drive the 8 km (5.0 mi) to the top.

[4] The revolving restaurant is the Giratoria confectionery, and there is also a "Refugio del cerro Otto" grill which makes bondiola sandwiches.

[5] Due to its prominence, Cerro Otto is notably a visual reference while navigating the city as it stands in between the neighbourhoods of San Joaquin, Los Cipresales, Las Vertientes, Los Maitenes, Melipal, El Faldeo, Parque Cerro Otto, Virgen Misionera, Peumayen (colloquially known as "the kilometers") from the North and El Frutillar, 645 Viviendas, Lomas del Cauquen, and Arelauquen Country Club from the South.

[citation needed] On top of the mountain a rotating cafeteria owned by the Sara María Furman Foundation is most prominent, constituting a notable lookout overlooking the city, Nahuel Huapi and Gutiérrez lakes, and the Andes.