Mumbai is a sensory overload in the best way. Our street food tour was the ultimate highlight, from the "elite" Bombay Sandwich to pani puri and sweet kaju katli. I even attempted a Bollywood dance class—far from a pro, but it was pure fun! The energy peaked as we watched India clinch the Cricket World Cup alongside locals; the city erupted in a way I’ll never forget. Mumbai was a 24-hour adrenaline rush.

We arrived in Puno just in time for dinner, so we checked into our hotel and headed out to explore the town. There is a main street,...