To check the depth of the well, Mac drops a rock that falls for about 5 seconds. Based on the free fall formula d = 0.5 * g * t2, where g=32 ft and t=5, the well is approximately 400 feet deep.
The mountain peaks shown in this episode and referred to as "Los Dos Pumas" are actually known as "The Lions". The Lions are a pair of pointed peaks along the North Shore Mountains in Metro Vancouver, British Columbia, Canada.