Yellowstone National Park - Old Faithful Geyser Postcard

UNESCO WHS Serie - Yellowstone National Park - Upper Geyser Basin - Old Faithful Geyser - Yellowstone National Park is a protected area showcasing significant geological phenomena and processes. It is also a unique manifestation of geothermal forces, natural beauty, and wild ecosystems where rare and endangered species thrive. It also has the world's largest concentration of geysers (more than 300 geyers). Old Faithful is a cone geyser located in the Upper Geyser Basin. It is a highly predictable geothermal feature, and has erupted every 44 minutes to two hours since 2000. Eruptions can shoot 3'700 to 8'400 US gallons (14'000 to 32'000 L) of boiling water to a height of 106 to 185 feet (32 to 56 m) lasting from ​1.5 to 5 minutes. Intervals between eruptions can range from 60 to 110 minutes. World Heritage Sites in the USA - Name: Yellowstone National Park Country: United States of America Location: Wyoming, Montana, Idaho Site: Upper Geyser Basin - Old Faithful Geyser Inscription: 1978 Category: Natural (vii)(viii)(ix)(x) Unesco Ref: 28 Special Feature: The card has a QR-Code on the backside to navigate for more Informationas about the site.