Did you take these? If so did you swim in blue hole? That looks epic!
No, I just found them, I don't live in Texas anymore. I did live in Austin for a while; really beautiful rolling hills over there. Some wealthier houses use the landscape as part of their architectural design. My dad was an electrician, I lived with him for a few years. He got to work on Michael Dell's house one time, and drove me around and showed me one of Willie Nelson's houses too. There are more than a few very wealthy people who have a house in Austin.
Now I live in Louisiana. I could take a picture of the bayou if you like. Never seen water so brown before. :p
Given the size of Texas, I don't doubt it.