Goiapaba-Açu, Mountain summit in Fundão, Brazil

Goiapaba-Açu is an 850-metre summit on the border between Santa Teresa and Fundão, in Espírito Santo, Brazil. It is the main attraction of the Goiapaba-Açu Municipal Park, standing where the mountain region meets the coastal lowland. From the top, the whole slope of the Serra do Castelo can be seen down to the sea.

The peak lies on the boundary between Santa Teresa and Fundão, and the surrounding area was later protected as the Parque Municipal do Goiapaba-Açu, where the summit is the main attraction. The sources do not record the origin of the name or any Tupi naming.

The name Goiapaba-Açu comes from Tupi: it is the peak where goia birds gather, and açu means large. The summit is the main attraction of the Parque Municipal do Goiapaba-Açu, which lies between the mountainous region and the coastal lowland of Espírito Santo.

The summit lies on the boundary between Santa Teresa and Fundão, inside the Parque Municipal do Goiapaba-Açu, and is reached on foot; the source gives no trail details, so arrange access with the park administration in advance. From the top the slope of the Serra do Castelo can be seen down to the sea.

The peak marks the border between Santa Teresa and Fundão, and from the top the entire slope of the Serra do Castelo can be seen down to the sea. It is the main attraction of the Parque Municipal do Goiapaba-Açu, which lies between the mountainous region and the coastal lowland.