Hanok cafe Tteruan Teahouse, located in Ikseong-dong, Jongno, is well-known for making teas with 100% Korean ingredients.In particular, herbal tea is made from boiling down the ingredients for more than 10 hours every day and the red bean in red bean soup or red bean shaved ice is directly prepped and used.Perhaps due to such sincerity, it became famous as it went viral and has appeared in multiple TV programs, including .More than 10 types of tea are served including herbal tea, fermented enzyme tea, wild leaf tea, and floral tea.If you truly want to enjoy a variety of tea, Ikseong-dong’s Tteruan Teahouse is the best option for you.