One of many altars
These big cathedrals are basically just gigantic multi-purpose rooms. Parts of the cathedral can be "broken down" into smaller worship areas depending on the size of the crowd or the particular religious holiday. York cathedral has a bunch of chapels located along the sides of the building while the main part of the structure or nave can be broken down into three seperate worship areas. This altar stands near the front section of the nave just before the quire.