Photo: LoneStarMike, CC BY 3.0 Free historic sites in Austin
Photo: LoneStarMike, CC BY 3.0 
Photo: WhisperToMe, Public domain Texas State Cemetery
Free, always
Photo: Bryan Rutherford, CC BY-SA 4.0 Elisabet Ney Museum
Free, always
Photo: ajay_suresh, CC BY 4.0 Sixth Street
Free, always
Photo: Larry D. Moore, CC BY 4.0 Treaty Oak
Free, always
Photo: Larry D. Moore, CC BY 4.0 UT Tower
Free outside, paid inside
Photo: ajay_suresh, CC BY 4.0