The Big Basin Preserve
An area of Kansas that not many seem to know about is the Gypsum Hills region. This is a formation of old rock from the Permian era, and has a lot of iron in it that turns red when exposed to the air. The western end of this red hill formation is home to The Big Basin Preserve.
South of Dodge City on Highway 283 you go down a good sized hill that looks about like most others in the area. However this one is a one mile diameter sink hole that is 100 feet deep. The highway goes right through it and there is a Historical Marker in the bottom. You can also drive up into the Preserve itself, and see Little Basin and St. Jacob’s Well.