jumping-off place

[jumping-off place] {n. phr.} 1. A place so far away that it seemsto be the end of the world.

Columbus' sailors were afraid theywould arrive at the jumping-off place if they sailed farther west.

So you visited Little America? That sounds like the jumping-offplace!

2. The starting place of a long, hard trip or of somethingdifficult or dangerous.

The jumping-off place for the explorer'strip through the jungle was a little village.