Buchang Jegwa Shinsegae Department Store Gangnam Branch is a walnut pastry shop in the Sweet Park of Shinsegae Gangnam, near Express Bus Terminal Station. Its Uyuni salt walnut pastry brings out the flavors of sweet filling and butter, crisp on the outside and moist inside. Eaten right after purchase, it is crisp; kept at home, it turns chewy. The waiting line is long, so buying takes time.