During my recent Kansas visit, Loren took me to see historical Pawnee Rock. The 360 degree view was great, but I was most drawn to the old graffiti, left by travelers in the late 1800 and early 1900s. Fascinating!
Per Wikipedia, “Pawnee Rock is one of the most famous and beautiful landmarks on the Santa Fe Trail. Originally over 150 feet (46 m) tall, railroad construction stripped it of some 15 to 20 feet (6.1 m) in height for road bed material. A memorial monument, picnic area, and pergola have been constructed on the top. From the top of the pergola is a view of the Arkansas river valley and the route of the Santa Fe trail. Today it is a prominence rising 50 or 60 feet (15 or 18 m) above the surrounding plains. Matt Field, who traveled the Santa Fe Trail in 1840, later wrote, “Pawnee Rock springs like a huge wart from the carpeted green of the prairie.” Traders, soldiers, and emigrants who stopped, carved their names into the brown sandstone. Some of these names are still visible among the graffiti of the more recent visitors. Pawnee Rock was added to the National Register of Historic Places around 1970.”
SueBee Arts 
Interesting place.
I really enjoyed the graffiti and the view.