In Wiltshire, England is an ancient forest called Savernake Forest. It dates back at least 10 centuries and is known for its massive beech and oak trees, as well as ghosts.
This area of land was put into the care of Richard Esturmy after the Norman Conquest in 1066. Since then, Savernake estate and forest has passed down from father to son (or daughter, on four occasions) in an unbroken line of hereditary "forest wardens". In 31 generations, it has never once been bought or sold in a thousand years, and today it is the only ancient forest in Britain still in private hands.
The Big Belly Oak is an 1100 year old oak tree deep in the forest that still lives. You can hike to it and apparently, stand inside it.