Strongholds & Followers by Matthew Colville

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

Creating Strongholds for Your DND Character: Castle to Kingdom Strategies

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)

Walkthrough:The Three Forts, Stronghold Wiki

Canaanite Stronghold From the Time of the Judges Found in Israel

Strategic beauty: Incredible, wondrous castles of Turkey

The temple is A palace of - Driven Deep by Paul Moore

CASTLE SYSTEM - Magnetic Modular Terrain for RPG & Wargames by Boar Games — Kickstarter

Ring of Scale Expansion Preview: Veeshan's Peak

Castles and fortresses in Armenia and Nagorno-Karabakh