Seogwipo

There are no jjimjilbangs in downtown Seogwipo, and only one in the greater city, quite literally located under the World Cup Stadium the southern grandstands to be precise:

Jeju Water World

A rather large jjimjilbang located near the beach and attached to an indoor water themepark. Has the usual heated rest rooms and ice room but also smaller darkened sleeping rooms for not just women but men too. Promise of a Nintendo area in the near future. For your sleep, expect a pair of cotton pyjamas, sauna access and a patch of warm, hard floor. Despite its immense size, this place takes the Korean running gag about insufficient sleeping mats to a whole new level of cutthroat with even fewer than a standard sized premesis.

The fanciest and most expensive hotels in all of Jeju tend to be situated within the Jungmun Tourist Resort Complex alongside Jungmun Beach, west of downtown Seogwipo:

5 star hotel. The Shilla Jeju is set in its own private 21-acre cliff-top gardens at the centre of the comprehensive Jungmun Tourist Resort Complex on the South coast of Jeju lsland. Since the opening in 1990, as Korea's first 5 star resorts, The Shilla Jeju has been the most prestigious venue in the Jungmun Tourist Resort Complex.

5 star hotel with 224 rooms and suites. All rooms have balconies and most have ocean views.

4 star hotel. 225 guest rooms in a 9-floor building with, some sea-side, some mountain-side. Traditional on-dol rooms as well as suites for business travelers.

Shinsung Hotel

Hotel with internet and jacuzzis in most rooms. many rooms have a nice sea view. 50,000 for a double room per night. rooms numbered -01,-02 and -03 face the sea, so ask if you want a sea view