The expectations of many who've reviewed Olentangy Indian Caverns seems quite high. I've been to Mammoth Caves and this is certainly not that. However, if you're into trekking and enjoy State Parks, this is a great place for a day trip - especially with a family of four or even a low-key couple wanting to take a picnic.
The caves themselves can be toured in less than an hour. There are also other activities, such as the Gem Mining (a sluice set up for younger children to get a feel for sluice panning, but not authentic), There is also a decent Gift Shop and outdoor activity areas, such as the Jungle Gym, Volleyball Courts, and several open and shaded areas.
The drawback would be *IF* you're expecting something like Mammoth Caves or something of that caliber. OIC do not have tour guides for the caverns, but they do have some audio/visual guides set up within the caves.
I recommend you take a small flashlight (Mini Mag?) and a light sweatshirt because the caves are a temperate, yet damp 55 degrees or so. Other than that, the choice of adventure is up to you. - Cave admission is only 9.50 as of Aug 2013. I don't know that you can necessarily beat that price for that experience, unless you hit up the park or a playground - and those pale in comparison.
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