Date hiked: July 6, 2008
Distance: 2.0 miles
Elevation gain: negligible
Time: 1.5 hours
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi_BXwPJ816CbbemH0fvQlqWhHmJxIGuuifYxqE3vVucU_FAe7GCbaqbdJJap6eyXINCglzi68COH3bUXwmEx6p2r3G8eCRUtoBkKflu8syycUSgiATXac0k7Mi19f0XxEEdFUp5g/s400/collage.jpg)
If you are not familiar with Yellowstone geology, there are all these steam vents, geysers, and other hot things because the park contains a giant caldera, basically an upside-down volcano. (Mom, don't worry. The last eruption was 640,000 years ago. But of course in your mind that means we're about due for another one.)
The most amazing thing about these thermal features are the colors. My favorite is the Pearl Geyser:
The the collage above, you can also see a colorful pool, and some bright green algae that has grown in a flowing stream.
There are also very loud steam vents, that sound very much like a steam-powered train.
Much of the water here is also sulfuric - you can smell the rotten egg smell wafting out of the ponds. The heat, combined with the acidity has killed any nearby trees.
And finally, this area features the most hilarious warning sign I've ever seen: