Geyser
Yellowstone is the largest geyser locale, containing thousands of hot springs, and approximately 300 to 500 geysers. It is home to half of the world's total number of geysers in its nine geyser basins. It is located mostly in Wyoming, USA, with small portions in Montana and Idaho. Yellowstone includes the world's tallest active geyser (Steamboat Geyser in Norris Geyser Basin), as well as the renowned Old Faithful Geyser, Beehive Geyser, Giantess Geyser, Lion Geyser, Plume Geyser, Aurum Geyser, Castle Geyser, Sawmill Geyser, Grand Geyser, Oblong Geyser, Giant Geyser, Daisy Geyser, Grotto Geyser, the Fan & Mortar Geysers, & the Riverside Geyser, all in the Upper Geyser Basin which alone contains nearly 180 geysers.
Volcano Park, Mayen-Koblenz
Museum with information on the history of volcanism and the geological history of the region
3 square kilometres of chambers hewn out of the volcanic rock 32 metres under the town of Mendig
Open-air exhibit on the life of mine workers extracting and processing basaltic lava
Cliff-face 50 metres high which records volcanological information about the eruption of the Laacher See volcano
Tallest cold-water geyser in the world
Exhibit of historical products made of basaltic lava and tuff
Former volcano at the Eich district of Andernach.
Built of tuff from the Meurin mine
Contains finds from the prehistoric and historic, including Roman, periods
Erosion has created a unique view of the interior of a 230,000-year-old volcano
Roman quarry in the lava flow from the Veitskopf volcano
Volcano whose basalt was used for construction in the Roman period and the early Middle Ages, for example in the Roman bridge at Trier
Quarry where Mayen Basalt Lava is extracted from the major lava field of the Bellerberg Volcano
Bizarre rock formations created by the eruption of the Hochsimmer volcano
Former site of basalt and tuff mining operations with remains of cranes, crane platforms, railway lines and buildings
West and east flanks of the large Bellerberg Volcano
Oldest and most important source of Mayen Basalt Lava
Site of the largest late Roman hill fort in the Eifel and Hunsrück
Twin maars at Boos