Chittor Fort - Wikipedia

Ancient Greek fortress may solve archaeological mystery in Jerusalem

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

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 Blacksand Bastion - desert stronghold - Paths Peculiar

The Greatest and Best Forts in the World - KarsTravels

The Fortress of Königstein

Along Hadrian's Wall, ancient Rome's temples, towers, and cults come to life

Castles and fortresses in Armenia and Nagorno-Karabakh

Under the Mountain: Durazh-Barak, Impenetrable D&D Dwarven Fortress

Paths to Adventure: Castles and Strongholds for Fantasy Grounds