Kilauea Volcano, Hawaii.

Lunar  Hawaiian Lava tube (Thurston Lava Tube).

Tongariro alpine crossing in New Zealand. Lord of the Rings, anyone?

Emerald Lakes at the Tongariro alpine crossing in NZ.

Nevado de Colima. An inactive volcano in the Colima volcanic complex. Its summit, at 14 000 ft, can be reached after a three hour hike. The hike gives the best views of Volcán de Fuego.

Volcán de Fuego in the background. This is one of the three most active (and beautiful) volcanoes in Mexico.

The city of Ciudad Guzman, in Jalisco, Mexico, is very close to the volcanic complex and ash frequently covers parts of the city. Dirty cars, dirty sidewalks, minor earthquakes and the risk of dying from an explosive eruption really annoys the people living there.