The "City of Z" refers to a legendary lost city in the Amazon rainforest, believed to be a place of great wealth and advanced civilization. The term gained popularity due to the explorations of British explorer Percy Fawcett, who searched for it in the early 20th century. Fawcett's expeditions sparked interest and speculation about ancient cultures in the Amazon. Despite numerous searches, the City of Z has never been found, leading to various theories about its existence. Some researchers suggest it may have been a myth, while others believe it could represent a network of ancient settlements. The mystery continues to captivate adventurers and historians alike.