The fairy-tale Gothic castle, almost from all sides surrounded by the river Ohře, is the dominant of the town of the same name. In the past the castle served as arrest for a long time, in 1898 installed in the margrave‘s house were the collections of the municipal museum. Today there are permanent expositions in the premises of the castle devoted to the history of the town and historic porcelain. A part of the sightseeing round is also the visit to the remnants of the Romanesque rotunda and ceremonial halls with frescoes, accessible is also the observation tower. A number of visitors are attracted by the exposition of the capital law and right of torture, in the summer season 2006 extended by new scenes of torture and collection of torturing instruments. The exhibition is located in the authentic environment of the arrest cells of some time. Within the framework of the culmination of the celebrations on the occasion of the second year of duration of that exposition, in the summer season a number of interesting events are being prepared at the castle Loket.
In 2001 the town Loket opened the Museum of Book Binding, probably the single permanent exposition of its kind in the world. Participating in the opening of the museum were fore art bookbinders Jan and Jarmila Sobotovi whose book bindings and book objects are in the collections of the whole world, from the national Museum in Prague to the Metropolitan Museum in New York. The permanent exposition had its seat, for several years, in the Černá věž (Black Tower) at the castle Loket, however, after several years the museum moved closer to the visitors, to the ground floor of the early Baroque town hall of Loket. In the meantime the collections extended by a number of new exhibits. Permanent expositions document the history of binding books from the Romance times up to the present time. Represented in the collections of bindings of the 20th century are the books with leather, parchment, linen and paper bindings covered by hand or colour-treated decorative paper, there is a book-binding workshop from the turn of the 19th and 20th centuries.