you need to look into Wonders. Here’s a breakdown of every Wonder available in Civilization 7. Angkor Wat Adds Happiness. Increased Specialist Limit in this City. Adjacent to a River tile.
In 2007, after a public competition, the list of the new seven wonders of the modern world was announced: the Colosseum (Italy), Chichen Itza (Mexico), Christ the Redeemer (Brazil) ...