Located in the heart  of Rio de Janeiro city, Pedra da Gávea is a monolithic mountain in Tijuca Forest. Composed of granite and gneiss, its elevation is 844 metres (2,769 ft), making it the highest mountain in the world that ends directly in the ocean. Trails on the mountain were opened up by the local farming population in the early 1800s; today, the site is under the administration of the Tijuca National Park.