You might be super brave - but would you be brave enough to ride these zip lines?! If you're not so into heights this may not be the activity for you… One of them is actually up in the clouds!

It does look super awesome though and there's some great views along the way. One zip line in Wales is the fastest in the world - it goes up to 100mph! Woah.

Watch the video now to see what it would be like to ride an extreme zip line!