The podcast episodes provided discuss topics related to UNESCO World Heritage Sites, specifically focusing on the Inca citadel of Machu Picchu in Peru and the historic city center of Quito, Ecuador.

The episode 'What is the mysterious city of Machu Picchu?' from the 'Who Smarted? - Educational Podcast for Kids' covers the history, construction, and rediscovery of the Machu Picchu site, which was designated as a UNESCO World Heritage Site in 1983.

The episode 'S15 Ep8: Service Please, by The Conduit & Design Hotels: Veronica Reed, Co-Founder Carlota Hotel' from the 'Conduit Conversations' podcast discusses the Carlota Hotel in Quito, Ecuador, which is located in the UNESCO-protected historic center of the city.