The world's most remote and extraordinary hotels. This episode explores Bolivia's Salar de Uyuni, a striking brutalist lodge seamlessly blending in with the edge of the world's largest salt flat. It also features a futuristic getaway of bubble domes in County Fermanagh in Northern Ireland, a mirrored resort overlooking a majestic Norwegian fjord, an art deco hotel nestles amid the Pyrenees, and the extra-terrestrial-inspired design of a unique homestay in Wales.

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Visits to a fortress-style hotel in the Empty Quarter in the United Arab Emirates, a minimalist hotel on the tranquil banks of a Norwegian river, a futuristic fantasy with three bespoke treehouses in Dorset woodland, an eco-friendly yellow submarine on the river banks of County Monaghan in Ireland, and a luxury hotel fashioned from repurposed shipping containers in the New South Wales Australian outback.

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An old Devon jail becomes an extraordinary luxury retreat, and opulent ancient caves bring the South African wilderness up close. A historic Swedish lighthouse on the rugged rocks of Paternoster Island shines a light for luxury seekers, while in tropical northern Queensland, an eco-resort offers stunning treetop accommodation.

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Unusual destinations featured in this episode include a mountain retreat at the summit of Mount Pilatus in Switzerland, and a striking Brutalist hotel that transformed concrete into an architectural masterpiece. Off-grid in the English countryside, two handcrafted geodesic pods offer the ultimate digital detox, while a working lighthouse on La Palma secretly houses a luxurious hotel.

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Featuring a South African nature reserve, Classic railway carriages repurposed as a luxury hotel in Kent, and curious submarine accommodation in the Scottish Highlands. An old freight crane is reborn as a harbour-side hotel in Hamburg, and there's a retro retreat in Utah, featuring wagons that never roll.

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In the Bradshaw Mountains in Arizona, USA, hidden down an 11-kilometre dirt road, is a luxury hotel built around a geothermal wonder. At The Bus Stop in Scotland, there are nine luxury buses for hire, while a secret retreat in Poland has been designed to look like an open chest of drawers. Plus, a one-of-a-kind glamping pod in eastern England, and a boutique bolthole inside an ex-windmill in Suffolk.

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