13. Seoul, South Korea
Source: Iconosquare
The capital of South Korea, Seoul is an impressive destination for its history. Located on the Han River, it is home to five UNESCO World Heritage Sites including the Jongmyo Shrine. It’s also home to the longest bridge fountain, called the Moonlight Rainbow Fountain, and the second largest indoor theme park called Lotte World. The city had 8.6 million visitors last year.