When picturing an island holiday, it's common to envision a sun-soaked foreign destination. But what if you could indulge in a sunny island retreat without needing a passport? This is the annual reality for residents of the Isle of Portland, Dorset's southernmost point. With summer temperatures averaging just below 20C and captivating sea views, it's an idyllic location. While its larger neighbour, the Isle of Wight, may be more well-known, reaching Portland doesn't necessitate a ferry journey.

Moreover, it's merely a three-hour drive from London. As a tied island situated just south of Weymouth, Portland is linked to mainland England via a slender stretch of sand known as Chesil Beach and a road bridge.

The island, spanning approximately four miles in length and two miles in width, is globally recognised for its Portland Stone - the same limestone utilised in the construction of St Paul's Cathedral, the cenotaph, and the United Nations headquarters in New York, reports MyLondon.

In addition to its expansive harbour, one of the island's defining features is the trio of lighthouses adorning its southern coastline. Two have been transformed into holiday homes, while the third, adorned in traditional red and white, remains operational.

Among the notable landmarks is Portland Castle, a 16th-century fortress erected by Henry VIII to deter potential French invasions. These historical sites provide fascinating pit stops during a leisurely walk along the island's picturesque coastline.

As you wander, you'll encounter the island's lively avian inhabitants. The distinctive and remote topography of the island nurtures a diverse range of plant and animal life.

The town provides all the standard facilities, featuring quaint pubs and eateries, along with several hotels for those desiring an overnight stay.

This island is indeed one of Britain's concealed gems, with its existence unknown to many. It could serve as the ideal spot for those in search of a slightly offbeat island retreat.