You land in Medellín, backpack on, excited for the city of eternal spring. Then you check into a hostel that blasts AC 24/7, uses single-use plastic cups, and has no recycling bin. The vibe feels off. You came to Colombia partly for its nature, yet your accommodation is working against it. That’s the exact problem I ran into my first week. Five hostels in, I started tracking which ones actually walk the talk. This guide cuts through the greenwashing. Here are the real eco-friendly hostels in Medellín that solo travelers can trust in 2026. 1. What Makes a Hostel Truly…