A 2km radius around the rarely visited Volcán Turrialba (3328m) became a national park in 1955, protecting mountain rainforest and cloud forest. It was once possible to hike to the three craters, but at research time the park was closed due to recent eruptions. Ash clouds have been so thick that flights into San José have been cancelled. It's possible to drive near the volcano and see it smoke, but signs forbid you to continue further than 8km shy of the summit.
It’s unclear how much of the park has been damaged by recent volcanic activity. The last report detailing an emission was in August 7, 2017. For more details, contact the park's headquarters or view the webcam (www.worldcamera.net/en/webcams/central-america/costa-rica/211-turrialba-volcano) set up 600m east of the volcano.