8 castle hotels worth crossing the world for.

The Astors' Italianate palace above the Thames in Berkshire, National Trust parterres and Profumo-era glamour across forty-seven grand rooms.

A New Forest country-house institution in Hampshire with treehouse suites over the canopy and five decades as the British weekend benchmark.

Heritage hotel within the 18th-century fort residence of Queen Ahilyabai Holkar, overlooking the Narmada River ghats at Maheshwar.

Sleep inside the gates of Versailles, with after-hours access to the palace and gardens.

Meticulously restored Regency mansion beneath the Slieve Bloom Mountains, with about 21 rooms on a 614-acre walled demesne and included estate activities.

Adults-only hotel carved into a 19th-century clifftop fortress guarding the Bay of Palma, with 30 rooms, saltwater pools, and a private cove.

Georgian country house on a 400-acre Hampshire estate with 45 rooms, a biodynamic home farm, Skye Gyngell restaurants, and Little Bothy spa.

A thousand-year-old castle at the heart of a 3,700-acre private estate on the Umbria–Tuscany border.