Pena Palace
Sintra, Lisboa, Portugal[21.6 miles]
This colour-fantastic, 19th-century Romanticist castle, built on a rock in the Sintra Mountains, is now a national monument and museum but was previously a summer residence for the Portuguese royal family. Built in 1854 on the orders of King Ferdinand, when the original monastery on the site was burnt down, it’s uniquely rich with decoration and symbolism – much at the best of the king and his wife Queen Maria.
Best for ages: 13+ | £7