Pico da Neblina. Pico da Neblina is the tallest peak in Brazil, 2,995.3 metres (9,827??ft) above sea level, in the Serra da Neblina, part of the Serra do Imeri, a section of the Guiana Highlands on the Brazil-Venezuela border. As determined by a border survey expedition in 1962, its summit lies just within Brazilian territory, at a horizontal distance of only 687??m (2,254??ft) from the Venezuelan border at Pico 31 de Mar??o.