We discovered this little gem in the northwest corner of South Dakota already five years ago and had it on our list of places we wanted to revisit since.
Castles National Landmark is located in the Slim Buttes land unit in South Dakota. The Castles are a massive sandstone remnant which originated as a volcanic ash deposit and resemble a medieval castle. (source: USDA - Forest Service)
This time we camped at this location and that gave us the chance to photograph these interesting rock formations during day light and of course during a wonderful sunset. As a bonus the moon was up already and made it worth to be included in some of the photos.