So drop in for a meal with a great view and maybe enjoy the spa as well. Below left is the view of Arenal Volcano from the restaurant. The picture above with the yellow flowers in the foreground was taken from our patio. Below our cottage at Montana del Fuego and visitors horseback riding. The Observatory is closest but the road to the observatory is reported to be very poor.
Some rooms have volcano view and they offer hikes onto the lava.
For those of us who didn't see the fire or didn't get a picture of it, here's a photo of a poster with a picture of Arenal that we found at the airport.