You cannot go up to the crater of Mount Vesuvius for free; as of 2026, it is a strictly regulated and ticketed experience. Access to the "Gran Cono" (the Great Cone) requires a pre-booked entry ticket, which typically costs around €10 to €12. These tickets must be purchased in advance through the official Vesuvius National Park website because there is no ticket office at the actual entrance and mobile reception on the mountain is notoriously unreliable. The fee contributes to the maintenance of the trails and geological monitoring of the active volcano. While you can drive or take a bus partway up the mountain into the national park area without a ticket, you will encounter a gate where your digital ticket is scanned before you can begin the final 20-to-30-minute hike to the rim. Furthermore, if you are driving your own vehicle, you must also pay a separate parking fee, which must often be reserved online as well. Even if you choose to walk from a lower point on the mountain, the final ascent to the panoramic views of the crater is guarded by park rangers who enforce the paid entry policy to prevent overcrowding and ensure hiker safety on the steep, ashy terrain.