Roughly translated as "ritual gaming place," Huaca Pucllana is undoubtedly one of Lima's most important historical monuments. Why, you ask? Well, this clay and adobe structure dates back to the 6th century AD, having served the Lima Culture (pre-Inca inhabitants of these parts) as an important center of administrative and ceremonial activity. Today, its impressive pyramid and dedicated cultural museum stand in stark contrast to the South American Mega-city that sprawls out around it, not too dissimilar to the juxtaposition you'll experience at some better known pyramids in Egypt. For around 12 PEN (less than $5 USD), you can explore the site and its ancient, unearthed artifacts to get a better sense of Lima's surprisingly rich and diverse heritage. If you're out and about in the city anyway, consider cashing in on that bargain.