Discover India's Biggest Forts: Historical Marvels Worth Visiting

Why the 'Land of Fire' brims with formidable castles and fortresses - KTVZ

Fortresses, Temples and Strongholds

DnD 5e Homebrew — Fortresses, Strongholds and Temples for Players

Build A Stronghold — Level Up: Advanced 5th Edition (A5E)

The ancient rock fortress of Yapahuwa is similar to, but smaller than, Sigiriya. Dating from the 13th century, it was the capital and main stronghold of King Bhuvanekabahu I (1272 - 1284)

The Fortress of Königstein

The Ancient City of Naqa - The Kushite Religious Stronghold

In the footsteps of fighting monks and pilgrims: Touring Israel's Crusader ruins

Walrock Homebrew: Worldbuilding Option: Fortresses, Temples, & Strongholds [Fourth Draft]

Paths to Adventure: Castles and Strongholds for Fantasy Grounds