The Inca Trail. Hands down the greatest thing I have ever done. I can not even begin to describe how amazing it felt to see Machu Picchu for that first time after hiking for three days. My hair was a mess, I was wearing basically no makeup, I had not showered for days. My body was tired and I was exhausted. But none of that mattered. And I don't think I have ever been so truly happy and content in my life.