Gheorgheni is hidden in the north-eastern part of Harghita County between the Giurgiu Mountains the Borsec Gorge and Toplița. The historic castle of the Lazar family is a Renaissance castle that features battlements. A monument today, it used to be one of the most distinguished baronial homes in seventeenth-century ransylvania. Its earliest inhabited tower dates back to 1450. Bethlen Gábor, prince of Transylvania, spent his childhood years in this castle between 1590-1594.