The weather is beautiful these days, I've heard this is the most pleasant part of the year in Seoul. We wanted to go for a walk last weekend, but soon realized, you're not getting very far on foot. This is how we've found new favourite way to explore the city - a bike. And it is very simple. You just have to have the patience with the app which is 90% Korean 10% English and try-fail clicking the buttons until you manage to unlock one of the bikes. It is also super cheap - hours of cycling for a few 1000 KRW. Bikes are available everywhere and Soul has a great cycling infrastructure. You can get almost anywhere via bike lanes. Make sure you check the bike before you go though, they might have a flat tire, which is much harder to cycle (and gives Jin an opportunity to go faster than me).