Dongdaemun Design Plaza (DDP)

The biggest atypical structure in the world, completed in 2014, stands out due to its unusual size and curved exterior, which is suggestive of a UFO. The annual "Seoul Light" festival takes place at night, illuminating the whole structure with colorful lights to create a fascinating night view and projecting a message of hope and healing onto the building's exterior. As a major cultural hub in Seoul, it hosts a wide range of exhibits and fashion shows including video and light installations, as well as stores selling designer goods, restaurants, and rest areas.