Depending on what source you consult Seoul, South Korea is somewhere between the second most populous city in the world and the 18th but really, who are we to quibble over a measly eight million person discrepancy? The bottom line is, there’s a metric crap ton of people living in this amazing city (almost half the population of South Korea) and it would be absolutely ridiculous if we were to leave “The Special City” out of any discussion about South Korea travel tips (especially since last year Seoul was named the most expensive Asian city to live in and the third most expensive city in the world). If you’re looking for cheap or free there are several world class parks scattered throughout the city. The most famous, of course, being the Seoul Olympic Park, a landmark built specifically to host the 1988 Olympic games that now features several museums, a sculpture park and plenty of outdoor activities! But don’t forget the over 100 other museums, most of which are easily accessible via a very impressive subway system that unites the entire city in an easy to navigate web.