I consider myself to be fairly adventurous. I enjoy a little thrill and adrenaline makes me feel good, so I sometimes put myself in dangerous situations.
As an example, my old town has a river with a fairly strong current, strong enough that swimming is prohibited. At some points along the bank the embankment gets really steep and rocky, with many rocks being quite loose. I like to wander about down there, even in spite of the knowledge that one wrong step could very easily cause me to fall in, which would be deadly as someone who isn't a strong swimmer. It's just too beautiful to resist down there.
I have also spent a lot of time wandering about the woods by myself. I typically stay close to town, so if I need to run I can, but I've gone further out before without pepper spray or anything to protect myself with. Although that's not so I can experience adrenaline, that's simply because I love the outdoors. Not carrying any defensive object is not recommended in a place where bears and cougars are fairly common.
I climbed a 200ft waterfall once. There is a small area right beside the falls where you can climb up, but it does get rather narrow and steep in some places. It's a gorgeous place and I needed to experience the view from up top.
I am far from a daredevil, but I am a firm believer in getting out there and experiencing the world. If that means I have to navigate a dangerous bank or climb a steep hill, so be it. If there is something I really want to do, I try to do it if I know it's possible. Life's too short not to take risks sometimes.