It's about a two hour time investment and $26.00 per person. Quite a bargain for a short boat ride across a beautiful big lake, a fun shuttle ride up the mountainside and one hours worth of exercise climbing up and down hundreds of stairs following a young guide through the caverns. The climb was a little steeper than some other caverns that we've visited in the past few years but they were doable. I always try to visit any caves or caverns we may pass while on road trips and this one was quite similar to others, except for the boat and shuttle ride necessary to reach it. The caverns are only a short drive from Hwy 5 and don't require much effort to visit and I recommend it as an interesting side trip.