Seoul is home to the world's fastest internet connection, reaching speeds up to 1 GBPS. By 2015, the city also plans to offer free Wi-Fi in parks, streets and other public places.
Seoul became the first city in East Asia during the late 19th century to use electricity in the royal place, built by the Edison Illuminating Company.
It is an important economic part of the country since it headquarters some Fortune 500 companies such as Samsung, LG Group and Hyundai.
The population has proved to be the second densest in the world, next to Paris. The population is almost eight times as much as Rome.
Lotte World, a recreation complex in Seoul, beat a Guinness World Record by housing the world's largest indoor theme park. It has also has an outdoor park, hotels, shopping malls and more.
The city originally had a fortress stone wall built around it in 1397 as protection from invaders like wild animals and thieves.
The city's tallest mountain and national park, Bukhansan, also holds a Guinness World Record for the most visitors per square foot.
It is one of the eight first-level cities of South Korea and became a 'special city' as of 1949.
The city holds a "Hi! Seoul Festival" four times a year, each seasons, since 2003. It is based on 'Seoul Citizen's Day', which has been celebrated every October since 1994 to commemorate the 600 years of Seoul as the capital.
There have been a number of games hosted there, including the 1988 Summer Olympics, the 2002 FIFA World Cup and the 1986 Asian Games.
is the third largest city in the United States by population, and the eighth most economically important city in the world.
The capital of the Democratic People's Republic of Korea.
is the 29th largest city in the United States, and considered to be one of the most environmentally friendly in the world.
Is a multinational electronics giant from Japan that offers its electronic products to the rest of the world.
The largest city and capital of Azerbaijan.
Is a South Korean car maker and one of the most recognizable car brands worldwide.
Is a car manufacturer in the country of South Korea and is the nation’s second-largest automobile brand
Is the capital city of the state of Florida.
The capital city of England and the United Kingdom.