5. Witanhurst House – London, UK
Witanhurst is a large Grade II listed 1930s Georgian Revival mansion on 5 acres (2.0 ha) in Highgate, North London. The mansion has 65 rooms spread across three floors, including 25 bedrooms. One of the largest is the ballroom, measuring 70 feet (21 m) long with a height of 20 feet (6.1 m). It has oak flooring and the timber wall panels are in walnut, with carved cornices embellished with gold leaf. Other rooms are the drawing room, study, entrance hall, and staircase, and most of the bedrooms are all in an opulent classical style.