Yehi'am Fortress National Park, National park with ruined fortress in Ma'alot-Tarshiha, Israel

Yehi'am Fortress is a hilltop stronghold in northern Israel featuring preserved stone walls, defensive towers, and residential spaces built across different periods. The ruins sit on elevated terrain where you can see the surrounding countryside, with different building sections standing side by side from various historical eras.

The Teutonic Order built the castle, called Judin, between 1220 and 1268 on land it bought in May 1220; it guarded the Crusader Kingdom of Jerusalem based at Acre. After Sultan Baybars took Montfort in July 1271, Jiddin passed to the Mamluks by the treaty of 21 April 1272 and was demolished on his order. In the 18th century the Husayn sheikhs and Daher al-Umar rebuilt it as the headquarters of the Sahil Akka tax district; Jazzar Pasha destroyed it after 1775.

The Arabic name Jiddin means "fortress of the heroes," and the Hebrew name Yehi'am commemorates Yehi'am Weitz, a Palmach fighter killed in June 1946 during the Night of the Bridges, four months before the kibbutz was founded below the walls. Since 1992 the fortress hosts a Renaissance festival during the Sukkot holiday, with family activities and classical concerts on period instruments, and dance performances are held in the main hall each summer.

The fortress stands 415 meters above sea level on a rocky spur overlooking the Wadi Jiddin ravine, 16 km northeast of Acre. The main entry is through a bastion in the lower ward's wall; the upper ward with its two ridge towers lies beyond. The site is a declared national park open to tours and visits year-round.

The fortress stands on a rocky spur 415 meters above sea level, overlooking the Wadi Jiddin ravine. Late 5th- to early 7th-century Byzantine spolia are built into its walls, among them a stone block engraved with a cross enclosed in a circle.