Mount Yasur is one of the most accessible active volcanoes in the world — you can drive most of the way up in a 4WD and walk the final 20 minutes to the rim. At the top, you stand at the edge of an active crater looking down into glowing vents that erupt continuously. The explosions project lava bombs into the air, often above the crater rim, and the noise is felt as much as heard.
Visits are graded by alert level. At lower levels (0 and 1), you can approach the rim closely; at level 2, you stay further back; level 3 closes the mountain. The volcano has killed visitors and guides in the past, and the risk is real — falling lava bombs are the main hazard, and no visit is entirely safe. That said, thousands of people visit Yasur every year. Go at dusk and stay through dark for the most spectacular experience; the glowing lava visible against the sky at night is extraordinary.