The Sedlec Ossuary, a unique and macabre chapel in Kutná Hora, Czech Republic, is easily accessible by public transport (train/bus) from Prague, followed by a short walk. Visitors can explore independently, but a guided tour or audio guide is highly recommended to understand its profound history and symbolism. It is generally open year-round, though operating hours may vary seasonally, with longer hours and higher crowds during summer; checking the official website for current times is advisable. The entrance fee typically ranges from 150-250 CZK, often available as part of a combined ticket with other local attractions like the Cathedral of the Assumption of Our Lady and St. John the Baptist, making a visit economical. A typical visit lasts about 30-60 minutes due to its compact size. Other insights include respecting the sacred nature of the site, refraining from touching the delicate bone decorations, and being aware that photography without flash is usually permitted. It's an essential stop when visiting the UNESCO World Heritage city of Kutná Hora.