Which is more common or correct:

When I have some time I generally go to THE NATURE/NATURE. (meaning 'countriside' or something)

If both, difference between the two?

Thank you.
Nature is usually used without an article but I wouldn't use it in your example:
When I have some time, I generally go outdoors. Or: I take a walk outdoors.
Here's an example of nature:
Nature would be better off without the influence of man.
Students: Are you brave enough to let our tutors analyse your pronunciation?
Thanks Cool Breeze!