Updated: Oct 5, 2020
On our second day in Jeju-do we ventured out to the east side of the island.
Manjanggul lava tube
Our first stop for the day was the Manjanggul lava tubes, also known as Manjanggul "cave". It was a rather nice drive out of Jeju City towards and along the north shore.
Parking is rather sparse, but we were able to snag a parking spot. Being a UNESCO world heritage site, this park is English and Japanese friendly, and you'll notice this immediately over the PA system.
The caves were pleasant to walk through, sans the other loud Korean visitors screaming and yelling. As you would expect from lava tubes, the air was cool and crisp throughout the 1 kilometer walk.
Aside from the railings and artificial walkways, the geological formations are quite fascinating to see.
Lava rafts and lava toes had solidified themselves within this large tube. Various sections narrow and widen, and even rock falls had occurred. Cracks can be observed where future rock falls are bound to occur.
The short walk of 1 kilometer ends at a railing restriction where a lava pillar stands, frozen in time and space.
This lava tube was nice to visit and was almost as fascinating as the Thurston lava tube back home on our largest island, the big island (Hawaii).
I guess I prefer no lights on comparison to the abundance of lights, signs, walkways, and noise, but this one was a UNESCO site, so it can't be helped.
We recommend those in the area to visit this geological formation, at least while it is still intact.