Arenal Volcano Overview. Arenal Volcano is the most active volcano in Costa Rica and is one of the most popular destinations in the country. Read about the volcano's interesting facts and historical dates that changed the course of this beautiful area The Arenal Volcano makes sense to visit for any/all travellers who want to see, tour, and learn more about a volcano during their trip, among experiencing so much else. Arenal Volcano National Park draws on the imagination as you wander through each of its unique and bizarre landscapes. Mount Kilimanjaro, Mount Fuji, Mount Rainier, Mauna Kea, and the Three Sisters are all volcanoes that are dormant and could erupt again. The Chato Volcano is actually right next to the magnificent Arenal Volcano. The Chato Volcano stands at 1140 meters or (3740 feet) tall and its lagoon is … Arenal Volcano Information Volcano Information In Top 10 of Active Volcanoes in the World. From the Heliconias trailhead, you'll walk into a hedge maze of tall grass– a similar species to sugar cane. Even though in the last few years there has been little to no lava action the volcano is … It’s a stratovolcano – a large, symmetrical volcano that’s built upon layers of ash, rock and lava – and at 5,437 feet (1,657 meters), it stands high above the rest of the countryside. It is conically shaped with a crater 140 metres (460 ft) in diameter. For the do it all type of traveller, you’re in luck. The Arenal volcano, Costa Rica. Arenal is Costa Rica’s best-known volcano. Its last major eruption, in 1968, destroyed two villages, and the volcano continued to spew lava and breccia into the early 21st century. Arenal Volcano (5,358 feet [1,633 metres]), about 56 miles (90 km) northwest of San José, is the country’s youngest stratovolcano. The Arenal Volcano is the smallest volcano in Costa Rica in size and also the most active . Image credit: Esdelval/Shutterstock. Arenal, a major tourist attraction in Costa Rica, is one of the most active volcanoes of Central America. Most people tend to overlook it because Arenal is so popular, but if you’re an avid hiker it’s definitely worth a visit. Since a major eruption in 1968, it has been in near-continuous activity building a lava dome and displaying mild explosive activity from the summit crater. Arenal Volcano (Spanish: Volcán Arenal) is an active andesitic stratovolcano in north-western Costa Rica around 90 km (56 mi) northwest of San José, in the province of Alajuela, canton of San Carlos, and district of La Fortuna.The Arenal volcano measures at least 1,633 metres (5,358 ft) high. Mount Rainier is considered to be one of the most dangerous volcanoes in the US, even though it has not erupted for over 500 years.