Castillo de San Julián - Credit: Wikimedia Commons
The Castillo de San Julián, also known as Saint Julian's Fort, is a fort in Cartagena, Spain. It was built between the 18th and 19th centuries, incorporating a tower which had been built by the British in 1706. The fort remains intact today, but it is in a rather dilapidated state. Read more on Wikipedia
Source: en.wikipedia.org