We are visiting the Margaret River area and would like advice on which caves to visit. The ones I am aware of are Ngilgi, Mammoth, Lake & Jewel Cave. We want to look at a few but worried that doing 4 caves in 3 days might be a bit over the top. I thought check out the Trip Advisor ratings but they all get 4 1/2 so that did not help! Any suggestions? We are a couple in early 50's and able bodied.