Veneto · Island
Alberoni Octagon Island
Ottagono Alberoni is a small fortified island of 0.2 hectares in the Venetian Lagoon, positioned at the southern…
Function
Fortification
90 places
Estero · Structure
Alcatraz Federal Penitentiary – Alcatraz Island – Virtual Tour 360°
Alcatraz Federal Penitentiary, known as "The Rock," operated as a maximum-security federal prison on Alcatraz Island in San…
Veneto · Building
Barracks Guglielmo Pepe
A 16th-century military compound on Venice's barrier island, fortified against Ottoman and Genoese threats, marking centuries of Venetian…
Sardegna · Building
Bastion of Saint Remy – Virtual Tour 360°
The Bastion of Saint Remy (Bastione di Saint Remy) is a monumental Neo-classical terrace and promenade built between…
United Kingdom · Palace
Beaumaris Castle
Edward I's ambitious fortress on Anglesey, begun in 1295 but never finished despite spending £15,000. A UNESCO-recognised masterpiece…
Lazio
Bunker Soratte
Bunker Soratte is an extensive underground military complex carved into the limestone flank of Monte Soratte — an…
Sardegna · Building
Cala d’Oliva Tower
The Cala d'Oliva Tower is a historic coastal watchtower standing at the sheltered inlet of Cala d'Oliva on…
Spain · Palace
Castle of Burgos
A hilltop fortress above Burgos, Spain, with roots in Roman times and medieval Castilian power—destroyed by French explosives…
Spain · Palace
Castle of Xavier
A 10th-century Navarrese fortress where Saint Francis Xavier was born, symbolizing medieval power and spiritual legacy in northern…
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