121 Le mal du pays Seoul is a perfume workshop in Hongdae where visitors can buy perfume and make their own. You smell dozens of scents, choose the ones you want, and combine them into a single bottle of perfume. Walk-ins are accepted without a reservation, and English instruction sheets are provided for foreign visitors. The finished perfume can be laser-engraved, and with so many scents available, choosing the one you like takes time.