Dal-in Geotjeori Kalguksu Shabu Ferrum Tower is a Korean restaurant in Ferrum Tower in Seoul that serves kalguksu, mandu and bossam. Its main dishes are geotjeori kalguksu, a bossam set meal, and a set with kalguksu, bossam and mandu together. The kalguksu portion can be made larger or smaller, the broth is refilled with another bowl when it runs low, and the geotjeori kimchi is refillable. The mandu are large, and the kalguksu broth is thick yet clear.