A stadium is a large structure which encircles a central field or a stage. Stadiums are typically horse-shoe, oval or a semicircular shaped edifice, with tiered seating arrangements for spectators. The Greeks and Romans were the first people in the world to build stadiums to host gladiatorial matches. Modern day stadiums are popular venues which host athletic events and concerts for large crowds. Modern stadiums unlike their ancient counterparts, boast of state of the art technology like giant flat screen HDTV’s for better viewing. Some stadiums even sport retractable roofs. To know more about the most expensive stadiums in the world, simply visit the link given below.