Herľany Geyser, Geyser in Herľany, Slovakia.
The geyser releases water up to 30 meters high through a 404-meter deep well, with each eruption releasing 600 hectoliters of mineral water.
In 1870, workers drilling for a mineral water source discovered the geyser when water explosively erupted for 10 days at heights reaching 112 meters.
The natural formation serves as an educational center where visitors learn about geothermal activities and their effects on the surrounding landscape.
Located near Košice, the geyser erupts every 32 to 34 hours, with schedules available through the local post office for optimal viewing times.
The cold geyser operates through rainwater infiltration and underground water circulation, maintaining consistent eruption patterns for over a century.
Location: Herľany
Inception: 1987
Operator: RCOP Prešov
GPS coordinates: 48.80111,21.47750
Latest update: May 16, 2025 11:11
Geysers represent some of the most visible expressions of hydrothermal activity, occurring where underground water reservoirs are heated by magmatic sources. Yellowstone National Park in Wyoming holds more than half of the world's known geysers, including Old Faithful with its reliable eruptions every 90 minutes and Steamboat, the tallest active geyser on Earth. Iceland offers the Haukadalur Valley, home to the namesake Geysir and Strokkur, which erupts every few minutes. The high plateau of El Tatio in Chile sits at 14,100 feet (4,300 meters) and forms the highest elevation geyser field in the world. Other notable locations include the Whakarewarewa thermal area in Rotorua on New Zealand's North Island, where the Pohutu geyser performs regularly, and the Valley of Geysers in Russia's Kamchatka Peninsula. These sites demonstrate the ongoing volcanic activity beneath the Earth's surface and attract visitors interested in observing natural thermal phenomena. Eruption patterns vary in frequency and intensity, with some geysers following predictable schedules while others remain irregular.
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