Finnish restaurant a limestone mine pop down LOHJA, Finland (Reuters) - Finns this week opened the ultimate underground restaurant with a four-course menu including escargot flambéed in Pernod. Popular Helsinki restaurant Muru set up a temporary eatery some 80 meters below ground in a limestone mine in the southern Finnish town of Lohja. Inspired by "pop-up" shops and restaurants, an urban trend of enterprising cooks and retailers setting up temporary shops in unusual spots, Muru calls its 10 night-only experiment a "pop down" restaurant. "The main theme with the menu was Element Earth," said chef Timo Linnanmaki. In addition to the escargot served with fennel risotto, the 128-euro ($160) menu features smoked vendace in lemon oil, roasted veal tenderloin and hanger steak simmered in herb stock. The mine is also the location for a laboratory of the elevator firm Kone, and diners are invited to don helmets and protection jackets for a tour down a 350-metre elevator shaft into the mine. Tables have already sold out for the event, part of a series of programs related to Helsinki's designation as this year's World Design Capital. Reporting by Attila Cser, writing by Jussi Rosendahl