This is one of the best things I have ever done in New Zealand; climbing up an active volcano. It is actually hot under your feet when you get to the red crater, and it smells like egg farts. I could barely walk for days afterwards, but boy it was worth it. Sometimes when you have been away from your home for a long time, or living inside an urban bubble, you forget how amazing it is. I love having my mind blown, especially by my own country.