The correct statement about Arenal Volcano in Costa Rica is: Visitors to the volcano area can participate in hiking, zip-lining, massages, and baths.
Arenal Volcano was indeed active until 2010 but is generally considered to be dormant now. The area is a popular tourist destination where various activities, such as hiking, zip-lining, and enjoying hot springs, are available. The claim about the area being closed to tourists is incorrect, as it is a major attraction. Additionally, while some activities may be costly, a trip to the Arenal Volcano can be done at various price points, so it is not accurate to say that it is extremely expensive.