Yellowstone is the world's oldest national park. It is in the far northwestern corner of the state of Wyoming in the USA. The area is packed with high Rocky Mountains, large and small lakes, steep canyons, rivers, diverse wildlife, many trees and there is a lot of volcanic activity. It is that activity that made Yellowstone worldfamous: the geysers, the hot springs, the steamvents and the mudpots.

I visited various parts within Yellowstone, starting at the Grand Canyon of the Yellowstone in the eastern section, where the canyonwalls are formed of yellow stones. In the north is Mammoth Hot Springs, my favourite sight. Drought springs and vivid ones mix up here. The warm waters flowing off from limestone terraces. South of Mammoth is Roaring Mountain. In the early morning the mountain seems to be on fire.

The southern part contains many geyser basins: the Old Faithful Geyser in the upper geyser basin being the most wellknown, but with many other ones equally attractive. The many colourful hot pools are another highlight in the basins.

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