Marketplace (or simply Market) is a location found on Kings Canyon. In Apex Legends Mobile, it was also used as a standalone Team Deathmatch map.
Gameplay
Marketplace is a mid tier loot zone located near the southwest side of Kings Canyon. The zone consists of a large rectangular building with a spacious interior, as well as a few smaller buildings around its front entrance. The main building has a large central area with a few smaller rooms on the sides, and its roof is accessible by ziplines leading up through holes in the ceiling. The building is surrounded on three of its four sides by mountain ranges, though there are tunnels cutting through them that lead north and south. The front of the building faces Relic to the west, and there is a Respawn Beacon to its northwest.
In 
Season 14, the tunnel leading north was moved from the easternmost side of the north mountain to the western side.
References
Season 1.