Climb Poás Volcano
The Poás Volcano is an active stratovolcano in central Costa Rica. It has erupted 39 times since 1828.
There are two crater lake near the summit. The northern lake is known as the Laguna Caliente (“hot lagoon”) and is located at a height of 2,300 m in a crater approximately 1.7 km wide and 290–300 m deep. It is one of the world’s most acidic lakes. The acidity varies after rain and changes in volcanic activity, sometimes reaching a pH of almost 0; consequently, it supports little or no aquatic life.