Today is our last full day in Guatemala, and we're spending it hiking an active volcano. Yes, that's right, 19 GSB-ers are headed up the mountain to play with fiery hot lava. You'd never get to do this in the States.

Most of us made the trek up on foot, but we had a few people who opted to take ponies up to reduce leg strain. At each rest stop on the way up, other pony handlers would call out temptingly to us "taxi?" I'm sure they do great business that way!

When we got to the top of the volcano, we could see lava oozing out, and we just kept getting closer and closer, until it seemed like our skin would burn off from the sheer heat. We toasted our sandwiches for lunch and had roasted marshmallows for dessert, all from the heat of the lava. A few people's shoes got suspiciously hot, prompting a mass retreat before the rubber began to ooze down the hill along with the lava.

The hike down went quickly, and after a little bit of down time at the hotel, we gathered for our final debrief of the trip. Everyone shared their key insights, and it was remarkable how many people had come away with similar conclusions, although we had not all discussed them with each other. It was a really nice synthesis of the experiences we'd had over the past week, and what we'd like to take from those experiences as we continued to consider the supply chain and the issues faced by the social entrepreneurs we had met.

The next morning it would be time to depart to head back to the States, but we had one last group dinner at the Casa Santo Domingo hotel, one of the nicest in Antigua. We got a chance to say goodbye to our guides, give them some gifts in appreciation, and enjoy each others' company before we headed back to our regular lives. It's been an amazing trip, we've certainly learned a lot, and have lots of questions still to answer once we're back at home.