Monolithos Castle is an ancient fortress located on the southwest coast of the Greek island of Rhodes. 

It was first constructed during the Byzantine era in the 6th century and underwent several additional phases of renovation and expansion during the medieval period. 

The castle was strategically built on a steep rocky hilltop overlooking the Aegean Sea, creating a formidable defense against attacks from both land and sea.

Today, much of the castle’s original structure has been lost to time, but visitors can still explore the remaining ruins, including sections of the fortress walls and towers. 

A winding pathway leads to the castle’s peak, offering impressive views of the surrounding landscape and the nearby Monolithos village.

Despite its ruined state, Monolithos Castle remains a popular tourist destination, attracting visitors with its storied history and stunning natural beauty.