@Rockbadchild, there is only one real choice here. Texas!
It will be hot in July. Wear light comfortable clothes and shoes, sunscreen is highly recommended.
I recommend checking out South Padre Island and Space X. SpaceX.com and
Flights to Harlingen/South Padre Island | Southwest Airlines®
From there grab a flight to San Antonio. Stat at a historical hotel on the a RiverWalk or close by like the St. Anthony or the Menger. Enjoy the Riverwalk, the Alamo, Downtown San Antonio is full of history.
The Alamo
Rent a car in San Antonio and drive to
Welcome To Fredericksburg, TX | Texas Hill Country. You will travel through some beautiful Texas Hill Country and meet some very nice people. Be sure and stop wherever you feel like it and if you are up to a nice hike make arrangements to “climb“ - basically walk up Enchanted Rock just north of Fredericksburg.
Enchanted Rock State Natural Area — Texas Parks & Wildlife Department
If any of this sounds to your liking I can fill in any details or offer a lot of other suggestion.
Other options in Texas: DFW - tour the stadium where the Dallas cowboys play.
Tours
In Ft. Worth visit the Texas Ranching Heritage Center. Check TSCRA.org. They don’t show any Ranch Gatherings in July but you might email and ask. It’s a real slice of true Texas life that you will experience at one of these. They will welcome you and make you feel at home. Here is some information on a Gathering to give you an idea.
Western Heritage Classic Ranch Gathering
We have the Texas Capitol in Austin, the French Legation is nearby .
French Legation State Historic Site | THC.Texas.gov - Texas Historical Commission
Texas is a huge State and is truly unique and there are so many things to do and see. Let me know if you have any questions.