(Getty Images)| In Mexico's ancient city of Teotihuacán – a UNESCO World Heritage Site that once boasted a population of more than 125,000 people – visitors will find the Pyramid of the Sun.

From exploring Mexico's diverse cities and magic towns ... its most impressive structure is by far the Pyramid of the Sun.

People bask in the sunshine during the Spring Equinox at the Pyramid of the Sun in the archaeological zone of Teotihuacan, Mexico, March 21, 2025. Every Spring Equinox, people gather to "gather ...