Self-guided tour of the gardens, which are set in a lovely, lush 40-acre valley above Onomea Bay. After crossing under the entrance gate, we followed a 500-foot elevated boardwalk down a steep ravine into a lush tropical rainforest, where we meandered along a series of nature trails, with over 2,500 species of exotic plants, a lovely waterfall, and vistas of Onomea Bay.