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Whether or not this German castle had an influence on Mary Shelley when she wrote the famous novel of the same name remains controversial. There is no doubt, however, that it has had a colorful past. Built over 800 years ago it has served as a hospital, tourist attraction, and allied base in World War II.
Krak de Chevaliers
A crusader castle built in Syria, T.E. Lawrence once described it as the “best preserved and most wholly admirable castle in the world. It was built as part of a series of castles intended to secure the Homs Gap and played a major role in coastal defense for the Crusaders.
Alcazar of Segovia
Found near the city of Segovia, Spain this distinctive fortification was constructed to look like the bow of a ship. Although it was originally built as a fortress it has served as a palace, prison, and even a college since then.
Situated in Bam, Iran, the bam citadel is the world’s largest adobe structure. It was built around 500BC and remained in use up until 1850AD. No one is completely sure why it was abandoned.
Considered one of the finest still surviving examples of typical Japanese architecture. It is composed of 83 buildings that still retain their advanced defensive mechanisms from the feudal period. Tourists beware!