Volcano an extinct volcano from a dormant (inactive) one. Dormant volcanoes are those that have not erupted for thousands of years, but are likely to erupt again in the future. Volcanoes are often considered to be extinct if there are no written records of its activity. Nevertheless, volcanoes may remain dormant for a long period of time. For example, Yellowstone has a repose/recharge period of around 700,000 years, and Toba of around 380,000 years. Vesuvius was described by Roman writers as having been covered with gardens and vineyards before its eruption of 79 CE, which destroyed the towns of Herculaneum and
Monvert Nature Park River Gorges National Park. The nature park has two main sections, the smaller visitors interpretation centre, and the nature walk over the larger natural area. The Visitors Centre, just off the A10, contains a display of the biodiversity, forests and invasive species of the country, as a basic overview. Behind the centre is the arboretum, where over 150 labelled endemic and indigenous species are grown on grassy slopes intersected with paths. Many are critically endangered or extinct in the wild. At the bottom of the arboretum is the fernery, where many of the island's critically endangered endemic ferns and orchids