The estate (the castle's land) covers more than 14,000 acres (57 km²). There are gardens and walking trails, as well as a farm which produces beef and a plantation (planted forest) which produces timber. There are two streams run through the estate. Near one stream, called the Glamis Burn is an "arboretum" (a tree garden) which has trees from all over the world, many of them rare and several hundred years old. Birds and other small wildlife can often be seen in the grounds.