2 Best Sights in Rhodes and the Dodecanese, Greece

In AD 95, during the Emperor Domitian's persecution of Christians, St. John the Theologian was banished to Patmos, where he lived until his reprieve two years later. He writes that it was on Patmos that he "heard … a great voice, as of a trumpet," commanding him to write a book and "send it unto the seven churches." According to tradition, St. John wrote the Book of Revelation in the little cave here, the Sacred Grotto, now built into the Holy Cave of the Apocalypse. The voice of God spoke through a threefold crack in the rock, and the saint dictated to his follower Prochorus. A slope in the wall is pointed to as the desk where Prochorus wrote, and a silver halo is set on the stone that was the apostle's pillow. The grotto is decorated with wall paintings from the 12th century and icons from the 16th.

The monastery, which is accessible via several flights of outdoor stairs, was constructed in the 17th century from architectural fragments of earlier buildings, and further embellished in later years; the complex also contains chapels to St. Artemios and St. Nicholas. Today, the site is inscribed to UNESCO's World Heritage list.

On its high perch at the top of Chora, the Monastery of St. John the Theologian is one of the world's best-preserved fortified medieval monastic complexes, a center of learning since the 11th century—today, it's recognized as a UNESCO World Heritage site. Hosios Christodoulos, a man of education, energy, devotion, and vision, established the monastery in 1088, and the complex soon became an intellectual center, with a rich library and a tradition of teaching. Monks of education and social standing ornamented the monastery with the best sculpture, carvings, and paintings and, by the end of the 12th century, the community owned land on Leros, Limnos, Crete, and Anatolia, as well as ships, which carried on trade exempt from taxes.

The complex consists of buildings from a number of periods: in front of the entrance is the 17th-century Chapel of the Holy Apostles; the main Church dates from the 11th century, the time of Christodoulos (whose skull, along with that of Apostle Thomas, is encased in a silver sarcophagus here); the Chapel of the Virgin is from the 12th century.