Africa
From: http://www.xproject.net/archives/cryptozoology/lmattack.html
A giant, 100 foot-long lake serpent that lurks in the swamps,
rivers, and lakes in Uganda, Africa has been feared by natives
because of its predatory nature, often taking large mammals or
fishermen. Explorers of the region heard these bizarre tales that
became more credible as some of them observed the creature themselves.