In July we went to Tucson, Arizona for a week. One of the things we checked out was the Arizona Sonora Desert Museum.
It is mostly outdoors. The exhibits are separate buildings, shaded areas, view points, etc. connected by walking paths. Temps were around 110 degrees. Don't worry, it's a dry heat... They had water fountains all over the place for filling up your water bottle. With water, a hat, and sunscreen, it was quite tolerable.
Arizona Diamondback rattlesnake
OMG spidah!!! A tarantula