Completed in 1143, this chapel is part of the Royal Palace complex in Palermo and was once described by the French author Guy de Maupassant as "the finest religious jewel ever dreamed up by the human mind." It is a mix of various styles, including European, Sicilian, Byzantine and Arabic, and features Byzantine mosaics and an Islamic-style wooden stalactite ceiling. You can also tour the Royal Apartments area, though they are closed Tuesday through Thursday, as well as the Royal Gardens. The palace also features rotating exhibits.

Recent travelers said the chapel is a must-visit and describe the mosaics as breathtaking.

Tickets to see the palace and chapel cost 12 euros (about $13.40), and it is open from Monday through Saturday from 8:15 a.m. to 5:40 p.m. Add a tour of the garden for another 2 euros (around $2.16). For more information, visit the official website.