Pinnacle Rock, located on Bartolomé Island in the Galápagos Islands, Ecuador, is a prominent volcanic feature formed from eroded lava rising sharply from the sea. Visitors can snorkel and swim in the surrounding waters, observe marine species such as fish, sea lions, and penguins, and walk along nearby trails leading to viewpoints across the island. The site is particularly notable for its origin as a volcanic plug shaped by erosion, its distinctive vertical form, and its role as a habitat for wildlife, including one of the few penguin populations found north of the equator.