The West Thumb Geyser Basin is actually on the shore of Yellowstone Lake.
Yellowstone Lake at West Thumb Geyser Basin
Pulling back shows the geyser basin
The next photo is one of the thermal pools at West Thumb and you can see that it drains into Yellowstone Lake.
Thermal pool draining into Yellowstone Lake
Looking at this short video of one of the pools at West Thumb demonstrates the heat rising
Norris Geyser Basin is located in the northwest area of the park far from Yellowstone Lake. On the highway a few miles before reaching the basin is Beryl Spring. This is one of the hottest springs in Yellowstone and the water temperature varies between 188 and 192 degrees F. The following video will give you a feel for the activity of this spring.
The following photo of Beryl Spring was taken in the morning and the cool air was condensing the water vapor into steam making it difficult to see the spring. The video above was shot later in the day after the air warmed up.
The next two photos are of the Norris Geyser Basin, one from each side of the walkway.
The following youtube video demonstrates the activity in the basin.