From Liquipedia Overwatch Wiki
Busan is a Control map in Overwatch.
Downtown: The teams fight around a train platform, with a dangerous hazard on one side.
Sanctuary: The teams fight around a small temple, with courtyards and raised areas all around it.
MEKA Base: A flight deck serves as the control point, with blast shields on three sides, periodically going up and down.
Top-Down View of the Map
Image courtesy of Statbanana: https://statbanana.com/images