Mayfair, located in London's City of Westminster, is a posh and upscale district known for its high-end residential properties, luxury hotels, and fancy shops and restaurants. Originally a rural area, Mayfair gained fame for hosting the annual May Fair from 1686 to 1764, which eventually became rowdy and was shut down. Developed by the Grosvenor family in the 18th century, Mayfair boasts elegant squares like Grosvenor Square and Hanover Square, attracting the upper class with its lavish homes. Today, it remains a swanky neighborhood in Central London, flaunting its prestigious status as one of the most expensive districts in the world.