黄石公园的大部分（约85%）为林木覆盖，绝大多数树木都是一种生命力极强的松树，叫扭叶松，到处都是，长得也没有出众之处，让你都懒得拿起相机给它们留个影。

        黄石公园的水和石，那就比较奇特了。奇在一个公园里有河，溪，湖，塘，泉，大小瀑布，特就在颜色上了，有人说那不过是一些矿物质和细菌而已，俺是一游客，又不是科学家，管它是矿物质还是细菌，就不去深究了，看个热闹吧！

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图12：梯田？


图13：熔岩上两枯松。


图14：无意中捕捉到的光束。

West Thumb Area:

• West Thumb is a caldera within a larger caldera.
• Active hydrothermal features exist on the lake bottom here and elsewhere in the lake.
• West Thumb Geyser basin overlooks Yellowstone Lake, the largest at high elevation in North America. You can best appreciate its vastness in winter when the frozen surface extends as a white sheet for miles. Summer is the season to appreciate the lake’s many moods. Here you can enjoy its calm, quiet mornings or witness the windwhipped whitecaps of afternoon storms. After storms, look for rainbows arching into the wilderness beyond, a land nearly as wild as when Native Americans and explorers experienced it centuries ago.
• The surface of the lake hints of what exists below. Surveys of the lake bottom in the 1990s documented hot springs and hydrothermal vents just offshore in West Thumb. Look closely – you
•  May see their swirling patterns in the water.
• As you walk among the basin’s superheated waters, you may wonder if the lake is warmer here than elsewhere. After all, the geyser basin pours an average of 3,100 gallons of hot water into the lake every day. But even here, the lake’s average summer temperature is 45F (7C). 

Mammoth Hot Springs Area:

• Limestone is the underlying rock here instead of rhyolite, which is dominant in the park’s other major hydrothermal areas.
• This area is one of the world’s best examples of travertine-depositing hot springs.
• It’s also one of the park’s most dynamic hydrothermal areas; its features constantly change.
• Maximum water temperature is 165F (74C).