In Sid Meier's Civilization V, which World Wonder can only be built in cities on or next to a desert?

The answer is Petra because it is a World Wonder that can only be built in cities on or next to a desert in Sid Meier's Civilization V. Petra is an iconic archaeological site in present-day Jordan, famous for its remarkable architecture carved into sandstone cliffs. In the game, building Petra in a desert city provides a significant boost to the city's production, as well as additional gold and trade route benefits, making it an attractive choice for players looking to maximize the potential of their desert-based cities.