Aguja del Diablo, Mountain summit in Serra dos Órgãos National Park, Brazil

Aguja del Diablo is a needle-shaped mountain summit in Serra dos Órgãos National Park, rising to approximately 2050 meters. The formation features sheer rock walls on multiple sides that create a distinctive vertical profile when viewed from surrounding areas.

The sources record no first-ascent date or expedition for Agulha do Diabo, so its climbing history cannot be dated. What they do establish is its position: the 2,050 m rock formation lies in Guapimirim, Rio de Janeiro state, inside Serra dos Órgãos National Park, between Pedra do Sino and the Garrafão peak. Access runs via the Caminho das Orquídeas after the Pedra do Sino trail.

The name Agulha do Diabo means "Devil's Needle" in Portuguese, a reference to the sharp rock spire. The peak lies between Pedra do Sino and Pico do Garrafão, and the approach follows the Caminho das Orquídeas, a trail name that points to the orchids of the surrounding Atlantic Forest.

Access is via the Caminho das Orquídeas, reached after the Pedra do Sino trail; the Pedra do Sino trail itself starts from the Teresópolis headquarters of Serra dos Órgãos National Park. The summit lies at 2,050 m within the park, between Pedra do Sino and Pico do Garrafão, in the municipality of Guapimirim.

The peak lies between Pedra do Sino and Pico do Garrafão, and the approach follows the Caminho das Orquídeas after the Pedra do Sino trail. Climbers reach the Serra dos Órgãos National Park summit from Guapimirim, while the Pedra do Sino trail itself starts at the park's Teresópolis entrance.