The Pyramid of the Sun, located in Teotihuacan, Mexico, is a monumental ancient structure and a significant archaeological site. Accessibility can be challenging due to the steep climb to the top, but the site is generally navigable with appropriate footwear. While exploring solo is possible, a guided tour can greatly enrich the experience with historical context. There are no significant seasonal restrictions, though the dry season (November to April) offers more comfortable weather. Expect to spend approximately $50-$100 USD per person, including entrance fees, transportation from Mexico City, and possibly a guided tour. A typical visit lasts around 3-5 hours, allowing ample time to explore the pyramid and the surrounding Teotihuacan complex.