Hot take: the $2.50 night bus in Mexico City taught me more about travel than any tour
Last spring I was in Mexico City and a woman named Rosa on the night bus pointed at my map and told me in Spanish that the tourist buses charge 400 pesos for the same route the locals ride for 50. I started taking the bus everywhere after that and saved about $180 over 10 days, plus Rosa showed me a taco stand no guidebook ever mentioned. So here's my question: what's the cheapest local transport you've found, and did someone have to show you first?