At this time, I have learned about 12 sites used as fire lookouts and one site highly considered for another. We have an image for most of them.
WillhiteWeb.com
Yellowstone National Park Lookouts
Bechler River
Brunsen Peak
Divide
Madison River
Mount Chittenden (temporary)
Observation Peak
Pelican Cone
Purple Mountain
Snake River
Promontory
Still Standing
Former
Considered
Bechler River Lookout
Brunsen Peak Lookout
Divide Lookout
Madison River Lookout
Observation Peak Lookout
Pelican Cone Lookout
Purple Mountain Lookout
Snake River Lookout
Somewhere, there are panoramic images for the following locations. These locations are likely considered lookout sites or emergency lookout sites. Need to investigate once I can find the panoramics. Please contact me if you have them.
Panoramic Images
Pitchstone Plateau
Buffalo Plateau
Gallatin
Mount Norris
Saddle Mountain
Saddle Mountain West Point
West Yellowstone
Mount Sheridan No. 2
Pelican Cove No. 2