Almost the whole area of the island is accessible to the walker through a dense network of trails, most of which are maintained in good condition or have recently been restored and are well marked. Over 40 trails could be geological or natural or cultural. The time required for almost everything is about 3 hours of normal walking all the way.
With regard to the geological interest of the area for the walker, this is multidimensional: Nisyros is the youngest active Aegean volcano (the land products are more than 150,000 years old). It is a unique geotope and a listed monument of nature as:
- It maintains the structure of a classic stratiformat, which is not found elsewhere in Greece.
- It has a wide range of volcanic products, almost covering all kinds of volcanoes, in easily accessible displays. The whole of the island can be described as an open-air geological museum with great interest for the scientist-scholar, the geoscience student and the simple natural-visitor.
- There is a typical central caldera draft, 4 km in diameter, which is wonderfully preserved and makes it possible to observe the inner structure of the volcano.
- The bottom of the caldera recess hosts a multitude of hydrothermal explosion craters, world-wide for their size and structure, and intense hydrothermal action (steam and effluent puddles).
In terms of flora and fauna, interest is almost equal for all paths. The flora and fauna of Nisyros is of great interest due to the volcanic origin and geographic location of the island. It is for the flora, along with the Aegean islands and especially those along the Asia Minor coast, a route of migration of Asian species to the Greek area and to southern Europe in general and is located on the eastern migratory bird corridor which is the most important for Their migration to Greece and Asia Minor.
The recorded presence of 450 species of flora, 85 bird species of reptile species and the presence of the Monachus monachus seal on the coast make this island a place of special interest. Numerous olives, mallards and figs, along with oak and honey oak trees, define Nisyros as the "green volcano of the Aegean Sea". Lavender, the bell of Nisyria, the wild orchids and hundreds of other flowers, make up paintings of unique beauty, especially in the spring. The turquoise (the big lizards - agame stelio), the bumblebee (the Aristotle bloom or the magpie of the present Nisyros), the partridges, along with the eagle, the eagle, and dozens of other birds will accompany you in walking.
The southern slopes of the volcano are more "deserted" for various reasons (climatic, geological, overgrazing).