There are more than 5,500 caves in Missouri and the Onondaga cave is a standout one, located in Onondaga Cave State Park. It is an amazing view to witness such a colorful world created by nature in underground, using water to create colorful deposits such as stalactites, stalagmites, flowstones etc. This seems as if there is some golden mass accumulated or even reflects like hot molten lava. Truly spectacular scene!