Timothy Lake Loop, Portland, Oregon - mostly flat, stroll around the Lake with breathtaking views of Mt. Hood and beautiful forests. Be sure to get a look at Little Crater Lake, a small artesian pool near the trailhead.
Puerto Princesa Underground River is located about 30 miles km) north of Puerto Princesa, Palawan, Philippines. On Puerto Princesa Underground River was provisionally chosen as one of the the of Nature.