What is the setting of Poirot Investigates by Agatha Christie?

Poirot and Hastings travel to various parts of the world to do their work, including places like Egypt, London, and country houses. The settings are an essential part of the crime. The setting influences the crime as its elements are critical to the way robberies are executed. The most essential element in all the stories is the element of mystery. Some settings increase the suspense, such as the robbery of the diamond that is to be committed at Yardly Chase.