I wanted to follow up with more photos of Ohio. These photos were taken more than 100 ft below ground, deep in the Ohio Caverns, located about 1 hour east of Dayton.
The 45 minute tour of the caverns is very informative. The tour guide describes how minerals in ground water drip, endlessly, creating these beautiful stalagmites (form from the ground up) and stalactites (form from the ceiling down). It was explained that it has taken 200,000 years to form some of the larger pieces.
Touching the formations is prohibited. The reason, the guide explained, is that the oil from the human touch contaminates the purity of the minerals, causing them to turn a murky, almost gravy-colored, gray. It was quite sad to see one of the formations in such demise.
Please enjoy the photos below. The first photo below shows the Cavern's oldest formation, dating 200,000 years old or more, standing about 4 ft high.