Answer:
This patch of land stands alone
Passed from father to son and shared between brothers, its importance is unquestioned though it is used more by others.
A setting that proved to be deadly for Abraham Lincoln.
I'm the start of eternity and the end of space. There are two of me in heaven and one in hell.
If you have me, you want to tell me. If you tell me, you don't have me.
I am the fountain from which no one can drink. For many I am considered a necessary link. Like gold to all I am sought for, but my continued death brings wealth for all to want more.