You may not have heard of South Korea's second largest city (pop. over 3.5 million), but Busan (about two hours 45 minutes by sleek train from Seoul) on the Korea Strait in the country´s southeast happens to be a cool metropolis where you can enjoy a mix of exciting and laid back. Big-city attractions and amenities sit alongside historic landmarks, museums, and other cultural offerings, and greats beaches/ecotourism nearby. When you arrive, take a daylong bus tour to get yourself oriented, then go back and check out these highlights.

Read more in Tripatini contributor Heena Adwani´s post Why Busan, South Korea, Should Be on Your Travel List.