Fredericksburg, Texas is located about an hour and a half out from Austin, and is actually named after Prince Frederick of Prussia, and most of the town are descended from German settlers.
This past April, my college program made a weekend trip to Colorado Bend, Texas, which is only less than two hour away from the bustling city of Austin. Colorado Bend is a state park in the Hill Country region of the state, so we were able to spend some time hiking and exploring caves during our days there.
Fort Davis is home to the highest-elevated county seat in Texas, as well as the McDonald Observatory. Read more about my trip, where we learned about the incredible astronomical research being conducted here.
Port Aransas is about four hours away from Austin and is one of the longest barrier islands along the Texas coast. It's now become a fishing, beach and resort village, and the weather is incredibly nice (though be prepared for extreme humidity and lots of sunscreens, or sunburns, in our case).