El Junco is a lagoon formed by a collapsed cone of a long-extinct volcano that has transform into a fresh water source over the years. Located in the highlands of San Cristobal island, this is one of the very few permanent sources of fresh water on the whole archipelago. You can hike to the lagoon by using the long series of steps to the top. You can also walk around the crater to observe local fauna and flora and enjoy the spectacular view over the entire island of San Cristobal. This is a nice hike to benefit the fresh air of the island.