Answer:
I travel the world and I am drunk constantly. Who am I?
What devours all and can kill a king. Destroy a town and crushes mountains down?
The line a runner strives to reach
I know a word of letters three, add two and less there will be.
The lunch destination of choice for teenagers and hospital employees.
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.