Karlštejn Castle, a majestic 14th-century Gothic fortress located in the picturesque countryside of the Czech Republic, was originally built by Emperor Charles IV as a secure place for the safekeeping of the Imperial Regalia and other royal treasures. Visitors can explore the richly decorated interiors, including the Chapel of the Holy Cross with its stunning frescoes and semi-precious stones, and enjoy panoramic views from the Great Tower. The castle’s charming surroundings offer opportunities for leisurely walks and hikes, while guided tours provide fascinating insights into its storied past and architectural significance.