Matewai Spring

A hot spring pool with sinter deposits around it. It was an erupting geyser until 2003.

Te Kopia Mud Geyser

Unusual and a fairly spectacular mud geyser. During the periods of activity every 10-30 minutes, it ejects a muddy fountain that is some 3-10 m tall.

Orakei Korako (Waipapa part)

Orakei Korako, New Zealand

One of the world’s most exciting geothermal fields with some 35 active geysers and beautiful stone waterfalls – several large sinter terraces.

Mickey Hot Springs

Mickey Hot Springs

Geothermal field with thermal springs and mud pots. The hottest springs are boiling. Here have existed also intermittent springs.

Bumpass Hell

Bumpass Hell

Geothermal field with hot springs, fumaroles, mud pots. Visually the most impressive geothermal area near Lassen volcano.

Valley of Ten Thousand Smokes

Valley of Ten Thousand Smokes, Alaska

Valley that is filled with volcanic ash from an eruption in 1912. The layer of ashes is up to 210 m deep. After the eruption there formed thousands of fumaroles from this ashfield, most are extinct by now. Rivers have formed deep canyons in this ashfield.

Mount Martin

Mount Martin, Alaska

Volcano with a very active fumarolic activity. The crater contains an intermittent acidic lake and thick sulfur deposits.

Fumaroles of Mount Griggs

Mount Griggs in 1990

Hot and vigorously active fumaroles on the southwest flank of the volcano are roaring very loudly and can be heard far away.