Borsec (Borszek) is situated in the Eastern Carpathian Mountains of Transylvania, and is one of the most renown curative spas in the subalpine, windless, peat-rich county of Harghita. It is listed in the register of historical monuments. Bottling of Borsec commenced over two hundred years ago; since modernization in 1992, the facility outputs two million liters per month of its legendary "Regina Apelor Minerale SA Borsec" (Mineral Water Queen Borsec). The curative properties of the water were already known in the 1600s, and for centuries it was transported by carts in wooden casks to be served in the Royal Court in Vienna. It was Emperor Franz Josef who dubbed Borsec the "Queen of Mineral Waters."