Monument Rocks is a natural rock formation located in western Kansas, near the town of Oakley. It is known for its striking chalk formations that rise dramatically from the surrounding plains. These formations, which are part of the larger Niobrara Chalk formation, were created millions of years ago when the area was covered by an ancient sea. The site is often referred to as the "Chalk Pyramids" due to their unique shapes and towering heights. Monument Rocks is a designated National Natural Landmark and attracts visitors for its scenic beauty and geological significance, making it a popular spot for photography and exploration.