tongariro emerald lakes, new zealand

active ash blue camping cliff climb crater crossing earthquake edge emerald eruption glacial gorge great green height highlands hike hiker hiking island lake landscape lava ledge mountain mountaineering national nature new north outdoor outdoors park pass path pathway peak ridge rocks route scenery scenic season seismic spring sulfur summer sunny tongariro tourism tourist track trail tramping traverse trek trekker trekking turquoise vacation valley view volcanic volcano walk walks water wilderness zealand