Storm Island Expedition

The Mountains Low

I was barely north of the eastern hills and into a forest before I found what looked like a ruined statue.
Weathered, arcane runes, and the remaining stone barely came up to my knee.
Whatever it was in the past, no one seemed to care for it now.
I leaned over to touch it, and the remaining runes started to glow.  I tried to pull my hand back at the last moment, but it was already too late.
Next thing I know, I was no longer in the woods.  The ocean was to my north and east, the mountains to my south.  I had somehow ended up on the other side of the isle.  I also reminded myself of how much I was starting to hate teleporting around here.
There were no structures or statues near me.  The only thing notable about my current location was how smoothed over the ground was.  Something had been here before ... but now, the only thing I could see was one way out.
The mountain walls blocked me to the east. While the ocean was near, it was also a 50 foot drop down a very bad cliff wall, one that I couldn't climb.
My only path out, was a literal path.  So, I followed it.
The path weaved for nearly a mile thru the mountain.  Finally, I ended up near the northeastern inlet. The salt water of the ocean roared in under the mountains.  One look at those churning waters suggested I wasn't going to cross anytime soon.
A narrow path ledge actually led along the inlet into a cave beneath the mountain.
I was able to make quite a ways into a cavern before needing to pull out a lantern.
The path was very slippery, but I was able to maintain a good foothold.  A good thing considering how far it felt like I had trekked, again.
As I progressed, the water currents eventually slowed, but I could still smell the salt.

At the end of the trail, I found where the water seemed to flow underground. I leaned in as far as I dared, but saw nothing of note.  The water went under, quickly.  It didn't look like there was any room for me to swim under it either.  My first inspection of the flow didn't leave much room, if any at all, for me to pop my head out the water for a breather.
On the opposite side of the water, I saw what looked like another clearing, similar to what I had first arrived at.  Circular, with carvings in the wall.
I looked at the wall where the water went under, and found what was the remains of a walkway, though it must have collapsed over time.   Luckily there were jutting rocks and holes in the wall to allow for a few handholds.
Rock climbing wasn't one of my specialties.  Worse, it felt like I was only going to get one shot at it.  If I slipped, I would be dragged under the water, and led to who knows where, if anywhere at all.
With a great deal of effort, and luck, I barely managed to make it to the other side.
I held up my lantern closely to the writing on the wall.  They were the same runic symbols I saw from the statue before.
I reached out my hand, the runes began to glow.
Next thing I know, I am back outside.  This time, looking very very far down a mountain side.