Really neat! Definitely worth a stop.
I didn't climb to the top of the dunes as I am out of shape and was limited on time, but it sure seems as if it would be worth it.
Also, there's a free dry camping spot on the way to the dunes that I stayed in, right under Sacred White Shell Mountain. Just in case you're into that, GPS coordinates are 37.527, -105.5935.
Super cool! Like the other reviews say, it definitely is in the middle of nowhere but I didn't have a problem using Google Maps and just typing "Kansas Monument Rocks" so I didn't use the Roadtrippers address. Amazing how these rocks formed.
When you leave, take 83-S down to Keystone Gallery to get some unique souvenirs and check out some fossils, support some local business and nice people! Also saw some jack rabbits cross the road while on 83 :)
Really glad I found this gem when leaving the Monument Rocks! Great place to find some souvenirs along with some great service as well. If I ever find myself back in the area I will come back here just to chat up with the lady who runs the shop.
Decided to stop here in the middle of a long day of travel and it was a nice break. There is a parking lot near the start of the canal where I paid $8 for a two hour stay, there might have been cheaper/free options but I didn't look around. It was a really nice break from driving, not too long of a walk, so go around the entire canal! The art structures were cool.