Seoul Metro will operate the "2026 Mobile Stamp Tour (UNLOCK THE METRO: The Discovered Treasure Map)" from the 6th through July 3.
Themed around a "treasure map," the program invites participants to ride the subway and visit Seoul's landmarks in an exploration-style format, searching for hidden clues along the way.
The tour consists of seven themes and 35 detailed courses in total. Participants verify their train boarding through the "TtotaSubway" app and then use GPS authentication at each course location. This year, the system has been upgraded to require participants to enter the actual train number.
The first 1,000 participants who complete all seven themes and finish a survey will receive a mobile Seoul Love Gift Certificate worth 10,000 won.
