MINISERIES REPEAT: Today is the day on which the National Park Service celebrates its 100th anniversary – and to note that anniversary, PBS this week repeats this excellent, often breathtaking Ken Burns-Dayton Duncan six-part documentary series from 2009. Have a pad and pen nearby, to write down each place you’d like to visit after seeing it on this series – and by the end of the series, it’ll be quite a list. Check local listings.