Asan

Asan (아산,牙山) is a city in South Chungcheong Province in South Korea. It serves as the location of the oldest hot springs in Korea, Onyang Hot Springs.

Understand
It is located in the northern part of Chungcheongnam-do. The east-west length is 29 km, the north-south length is 34 km, and the length of the coastline facing Asan Bay is 7.96 km. The area is 542.62㎢, accounting for 6.6% of the total area of Chungcheongnam-do. As of 2020, the population was 332,124, which is about 15% of the total population of Chungcheongnam-do.

By train
You can get to Asan by taking the Janghang-seon Line Railway or Korail from Seoul. Pick up the Janghang-seon Line Railway train, which takes about 1 1/2 hours, at Yongsan Station, towards Onyang Hot Spring. The Korail train can be picked up at Yongsan Station as well, just take the train that will drop you off at Cheonan-Asan station.

If you are willing to spend time, Seoul Subway Line 1 gets you to Asan from Seoul in approximately 2 hours. By express train, the time gets shaved off at least 15-30 minutes, but you may have to transfer to an all-stop train at Cheonan Station.

By bus
Buses run regularly from Cheonan and Seoul.