High Quality Content by WIKIPEDIA articles! KeyArena at Seattle Center (commonly KeyArena), is a multipurpose arena, in Seattle, Washington. It is located north of downtown in the 74-acre (300,000 m2) entertainment complex known as Seattle Center, the site of the 1962 World`s Fair, the Century 21 Exposition. It is used for entertainment purposes, such as concerts, ice shows, circuses, and professional wrestling events.