Most of us know it as The Great Wall of Malta.
But now the Victoria Lines, stretching from Madliena in the east to Mgarr in the west, have been given the recognition they deserve by the BBC.
In the online edition of BBC Travel magazine, writer Adam Alexander explains why the huge wall, which slices through the Maltese countryside, was once so important for Malta and the British Empire.
He wrote: ‘Across the northern portion of the island of Malta is a spectacular defensive line which has incredibly lain abandoned for decades.
‘But unlike the stately Grand Harbour of Valletta or imposing medieval town of Mdina, few will have ever heard of the Victoria Lines, let alone seen them.’
The Victoria Lines were completed in 1897, the same year as Queen Victoria’s Diamond Jubilee.
They were built to defend Malta, a vital British military base, from possible attack from either Italy or France.
BBC Travel added: ‘It was the opening of the Suez Canal in 1869 which allowed European powers to access their territories in India and Asia without circumnavigating Africa, that was probably the most significant factor behind the building of the Victoria Lines.
‘With more and more ships traversing the Mediterranean Sea, Britain’s stronghold on Malta became increasingly strategically important.’
The Victoria Lines are set to become even more popular soon.
Just as hiking and rambling are surging in popularity, Malta has woken up to the fact that it has a glorious untapped treasure on their hands.
By the end of the year, the Malta Tourism Authority hopes to launch an official visitor walking trail for those wanting to explore the historic landmark.
Stephanie Attard Grech from the MTA said: ‘We are currently working on setting up two trails along the Victoria Lines from Kuncizzjoni to Mosta, and from Gharghur to Pembroke.’
Read more: Friends of The Victoria Lines Trail