and the ruins of Devín Castle. Čachtice Castle was once the home of the world's most prolific female serial killer, the 'Bloody Lady', Elizabeth Báthory. Slovakia's position in Europe and the country's past (part of the Kingdom of Hungary, the Habsburg monarchy and Czechoslovakia) made many cities and towns similar to the cities in the Czech Republic (such as Prague), Austria (such as Salzburg) or Hungary (such as Budapest). A historical centre with at least one square has been preserved in many towns. Large historical centres can be found in Bratislava, Trenčín, Košice, Banská Štiavnica, Levoča, and Trnava. Historical centres have been going through a restoration in recent years. Historical churches can be found in virtually every village and town in Slovakia. Most of them are built in the Baroque style, but there are also many examples of Romanesque and Gothic architecture, for example Banská Bystrica, Bardejov and Spišská Kapitula. The Basilica of St. James in Levoča with the tallest wood-carved altar in the world and the Church of the Holy Spirit in Žehra with medieval frescos are UNESCO World Heritage Sites. The St. Martin's Concathedral in Bratislava served as the coronation church for the Kingdom of Hungary. The oldest sacral buildings in Slovakia stem from the Great Moravian period in the ninth century. Very precious structures are the complete wooden churches of northern and northern-eastern Slovakia. Most were built from the 15th century onwards by Catholics, Lutherans and members of eastern-rite churches. Tourism is one of the main sectors of the Slovakia's economy, although still underserved. It is based on domestic tourism, as most of the tourists are the Slovak nationals and residents travelling for leisure within the country. Bratislava and the High and Low Tatras are the busiest tourist stops. Other popular tourist destinations are the cities and towns of Košice, Banská Štiavnica, or Bardejov, and numerous national parks, such as Pieniny National Park Malá and Veľká Fatra National Parks, Poloniny National Park, or Slovak Paradise National Park, among others. There are many castles located throughout the country. Among the tourists, some of the most popular are Bojnice Castle, Spiš Castle, Stará Ľubovňa Castle, Krásna Hôrka Castle, Orava Castle (where many scenes of Nosferatu were filmed), Trenčín Castle, and Bratislava Castle, and also castles in ruins, such as Beckov Castle, Devín Castle, Šariš Castle, Považie Castle, and Strečno Castle (where Dragonheart was filmed). Caves open to the public