Morro Cara de Cão, Summit in Urca, Rio de Janeiro, Brazil.

Morro Cara de Cão is a 98-metre hill on the western shore of Guanabara Bay in the Urca neighbourhood of Rio de Janeiro. Its name, meaning "dog's face", comes from the profile of its rocky slope above the water. On its summit stands the Fortaleza de São João, a Brazilian Army installation.

The mountain was the site where Rio de Janeiro was founded in 1565 when Estácio de Sá established the first settlements between this peak and Pão de Açúcar. These early settlements marked the beginning of European presence in the region.

The Fortress of São João stands here and serves today as a military training facility for the Brazilian Army. This structure shapes how people see the mountain and marks its role in protecting the bay.

The summit lies in Urca, on the west bank of Guanabara Bay, and the Fortaleza de São João occupies the hill; the site now houses the Brazilian Army's Centro de Capacitação Física do Exército. Access to the summit area is therefore tied to the fortress grounds rather than to open hiking trails.

The name refers to the hill's profile, likened to a dog's face (cara de cão) on the Guanabara Bay shoreline. The first Rio de Janeiro settlement, founded here in 1565, stood on the low ground between this hill and Pão de Açúcar, protected by a wooden palisade.