Royal Tennis Court, Hampton Court Palace

Far from being a museum, the Royal Tennis Court at Hampton Court Palace is the oldest tennis court in the world - and is still in use today. However, members of the public can gain admittance to see it. 

If matches are being played visitors can see the games in progress, the site states. Matches of real tennis, out of which lawn tennis grew, are played on a court with walls on four sides.

King Henry VIII played tennis at Hampton Court. Legend has it that he heard of the execution of Queen Anne Boleyn as he played tennis at Hampton Court Palace.