Answer:
A great mysterious place that the bold have been known to journey into.
A leathery snake, with a stinging bite. I'll stay coiled up, unless I must fight.
Sharp and long, flag of the world. What is it?
Hard to catch, easy to hold. Can't be seen, unless it's cold.
Two bodies have I, though both joined in one. The more still I stand, the quicker I run.
Iām grown from darkness but shine with a pale light. Very round I am and always a lady's delight.