Dubbing itself "Dream Bay: Masan", the city may not particularly bountiful in tourist attractions itself, but it is both compact and acts somewhat as a minor transport hub for the southern end of Korea making it an easy stopover location.
The nearest airport is Gimhae which has a lite rail to Busan (separate city from Busan). Direct limousine buses connect to Masan Station and the bus terminal every 15-20 minutes (W8000, 45 minutes, until 10pm).
There is also an express bus terminal near the baseball stadium. The Nambu bus terminal is also in South Masan (남마산) near Kyung Nam University (경남대학교).
The bus terminal in Hapsangdong goes between Sasang terminal in Busan. The Nambu terminal can take you to either Sasang or Heeundae (every 2 hours to Haeundae).
There are several city buses, most run north-south from the train station and bus terminal in the north down to Woryeong APT in the south. Many buses will also go out to Changwon, Jinhae, or some areas in the rural areas of Masan like Jangyu or Haman
If you see a bus going to 경남대 or 월영A, they're heading south to South Masan (Nammasan or Sinmasan). If you're going somewhere else in the city, you may find it best to take a taxi.
There is a fish market near the Bay.
Announced on November 13, 2007, a Robot theme park will be built here.
Take a ferry out to Dotseom Island, which has a carnival and circus in Masan Bay.
Hike up Muhaksan, a 700m mountain near the city centre.
There are many restaurants within a one block radius of the Nambu intercity bus terminal, including Japanese, Kimbap joints, pizza chains, and fast food, most of which have English or picture menus.
Roll's Rice, directly opposite the terminal entrance provides all manner of colorful dine-in sushi options and fusion dishes (think pastas, pilaf, omu-rice) with mains typically around the 8,000 won mark.
If you are traveling outside of Hapsangdong (the bus terminal) be sure to visit the Changdong arts district. There is a wonderful Mexican restaurant there called Mexico. It is owned by a Korean man and his wife. Fantastic food.
Also, Yanddeokdong has a some fantastic options. There is a great Vietnamese restaurant in the market about a 10 minute walk from the Shinsegae department store. This place is a little rough, but authentic to the core. Great food, owned by a couple who has been living in Korea for a while. They have plenty of pictures of the food, so no Korean or Vietnamese required. Just point at the picture. Plus, great Vietnamese tv. In the same neighborhood, there is a great Chinese restaurant. Look for the flags flags ad flags on signs, you will find it. Sure to be rewarded.
There are three good western-ish bars in Masan. If you are looking for the most westerners, check out All That Jazz in Dekori. Mr Lee, the owner, is super friendly and speaks great English. Most weekends, they have an event. There is pool, a poker table, and a small library. He also has a little food to munch on. The other is Joyce's in the Changdong Arts District. Great place. A little quieter, but Jay (the owner) is super cool and accommodating. He has free pool and darts. There is also Lounge Groo. Great martinis, friendly staff. Not too many westerners but a trendy place for Koreans and westerners. Great martinis. A good place to go out for an intimate night, or just to meet Koreans. Of course, there are lots of places for you to drink in Masan, like any other Korean city. These are just good places for people who want to drink something other than soju or beer, and possibly meet other foreigners.
There are numerous motels situated in the vicinity of the bus terminal.