In August 1996 Boston-based explorer Gregory Deyermenjian of The Explorers Club, along with exploration partner, Peru's Paulino Mamani, and Peru's Dante Núñez del Prado, Fernando Neuenschwander, Ignacio Mamani, and Machiguenga "Roberto" and his wife "Grenci" and baby daughter "Reina", was first to make an on-site exploration.