Pictures of the Panama Canal
The Isthmus of Panama, only about 50 miles wide at its narrowest point, was characterized by mountains, impenetrable jungle, deep swamp, torrential rains, hot sun, debilitating humidity, pestilence and some of the most geologically complex land formations in the world. Most of this was apparent to the explorers and surveyors who explored and measured the land. What was not obvious was the geological makeup of the land, which is a constant challenge even today, one that is held at bay, but not yet conquered. Please see this page here for places along the Canal to visit.