You can enjoy sightseeing Han River by biking along the river for FREE !!! Here is the detail where you can find this free facility : Hongjecheon Free Bicycle Rental Facility Open: 9am to 5pm * Facility is closed on national holidays and Sundays. Free Rental: 3 Hours * To extend hours, re-registration at the facility is needed. How to rent: Bring an ID card (Student ID, Alien Registration Card or Passport) to rent bicycle. Your ID is returned when you turn in the bicycle. Directions: Take the subway first to Hongik Univ. Station (Line 2, Stop 239), Exit #2 then transfer to bus no. 7612 or 7738. Get off at the Free Bicycle Rental Facility. Should be about 5 bus stops (note that drivers sometimes go by stops). Tel: 02-330-1655 (probably Korean-only speaker) Jamsil Bicycle Rental Facility Open: 9am to 6pm * Closed on national holidays. Free Rental: No limit, bicycle must be returned by 5:30pm. * Helmets available on request How to rent: Bring an ID card (Student ID, Alien Registration Card or Passport) to rent bicycle. Your ID is returned when you turn in the bicycle. Directions: JamSil Subway station(Line 2 & 8, Stops 216 & 814), Exit #2. Walk about 200m toward Seokchon Lake and you can find the facility on your left (it was on the right and may return there once the construction is done). For more detail, please read in the link below.