Mr Monkey caught a train to Eltham, and made Mr Rik carry him to Eltham Palace. Bits of this are medieval, but most visitors are interested in the 1936 house built for Steven and Ginie Courtauld. Mr Monkey was impressed by the curved colonnade outside, and more impressed by the Central Hall. This room looks circular when you're in it, but is actually triangular. The sides are curved, though.
You can read about Eltham Palace at the English Heritage website.
Copyright Rik Shepherd and Mr Monkey.