Hippos can be among the most aggressive and territorial creatures on the planet -- two groups of tourists learned this the hard way when a routine trip down Zimbabwe's Zambezi River leaves them fighting for their lives.

When an American Billionaire on a family safari and an amateur photographer holidaying with friends are attacked by elephants, their lives hang in the balance.

A routine outing in the mountains of northern California turns violent when unsuspecting trail-goers cross paths with the region's most notorious predator: the cougar.

Two Florida residents are attacked by alligators, only one survives.