Launching the adventure
wire suspension bridge in the foreground was originally for vehicles but now carries only a pipeline. The Pan-American Highway stretches from Prudhoe Bay, Alaska, to Ushuaia at the southern tip of South America. The only break is a short stretch of 100 km (62 mi) in Panama called the Darien Gap. About six months after our Sumidero adventure, we passed under the Pan-American Highway again when we took a boat tour through the Panama Canal.
Into the deep canyon
stalactite in the center, which does indeed look like a seahorse. A number of other stalactites are also visible under the cave's ceiling. Fossils of sea creatures can be found all along Sumidero's walls. These were deposited when the area was under an ancient sea. Billions of tiny creatures died over the millennia and their calcified remains drifted to the sea bottom. Over time these became the thousand-foot limestone cliffs.
approximately 260 m (860 ft) below the water's surface.