Hallim Park, Jeju

If you like botanical gardens the like, you'll enjoy the tour. The caves offer a welcome break from the summer heat. All of the placards include English translations, so you won't miss out on the context. The bonsai garden includes several 300 year old trees, which I thought was pretty cool. There are also a couple of gift shops where you can find some kitsch to commemorate your visit.

Nicely curated park in Jeju to while 2 to 3 hours away before heading to the beaches nearby. It has a palm avenue, bonsai garden, 2 caves, folk village and an aviary and it is suitable for oldies or kids. There is an in-park restaurant and gift shop. Expect to pay 29000 KRW entry fee for a family of 3. Parking is free. Come before 10am to enjoy the nice cool environment.

Great park/botanical garden with tons of various palm trees, caves, plants, trees, lizards... There are many different parks and "parks" on Jeju but this is perhaps the only one I'd truly recommend. It has decades of history and you can spend a pleasant couple of relaxed hours here. It is very close to Hyeopchae and Keumneung beaches, which is another plus.

A place for stone, plant & peacock lovers. The bonsai are extremely beautiful.

The park is very large. It seems to have compressed various natural resources of Jeju Island in one place. However, it seems to be lacking in concentration because it is too large.