View back across the crossing from Blue Lake
The snow capped peak in the distance is Mt. Ruapehu, the red cone belongs to Mt. Ngauruhoe (aka Mt. Doom), and the crater in the front is Mt Tongariro. The Emerald Lakes are just in front of that, and you can just make out the path of the crossing we walked along the right of Mt. Tongariro's crater coming forward across the flatter ground.