A "stadion" is an ancient Greek term that originally referred to a measure of length, approximately 600 feet, which was used in foot races. It later came to denote the venue where these races took place, often featuring a long, rectangular shape. The most famous stadion was located in Olympia, where the ancient Olympic Games were held. In modern times, the term "stadium" has evolved to describe large structures designed for sports and entertainment events. These venues typically include seating for thousands of spectators, along with facilities for athletes and amenities for fans. Examples of contemporary stadiums include Wembley Stadium in London and Camp Nou in Barcelona.