The volcano was made part of the National Park in 1995 and is located about 26 miles northeast of Fortuna in the Guanacaste Province.

The Rio Celeste appears blue due to the emission of sulphur from the volcano and precipitation of calcium carbonate.

Thermal springs and small geysers dot the area as do rivers, waterfalls, lagoons, and places providing panoramic views.

[1] Tenorio Volcano National Park adjoins Tapir Valley Nature Reserve, a former cattle ranch that was rewilded in 2004.

The 20-acre wetland within the nature reserve is the only known location of the Tapir Valley tree frog (Tlalocohyla celeste).