Arenal Volcano National Park lies in northern Costa Rica, in the Arenal Huetar Norte Conservation Area, near the town of La Fortuna. SINAC, the country’s conservation authority, describes a protected area of about 12,080 hectares with public-use sectors around the volcano. The landscape combines forest, volcanic slopes and views toward Lake Arenal. It is tempting to treat the cone as the whole attraction, yet a visit is really an encounter with a wider ecosystem: trails pass through habitats and old lava terrain, while the park’s rules keep visitors within designated areas.
The volcano’s modern story includes a dramatic change in scientific understanding. The University of Costa Rica’s National Seismological Network records that a major eruption began on July 29, 1968, after Arenal had been considered extinct because no historic eruption was known. The event initiated a long period of eruptive activity that transformed the western slopes and surrounding communities. That history explains the dark lava fields visible from authorized routes, but it does not mean visitors should approach the crater. SINAC states that access to the volcanic cones is prohibited; scenery is to be enjoyed from designated visitor areas.