Traveler’s Notes . . .

As of last week, there were still tickets available for 17 days during the July 1 to Aug. 30 period when Princess Diana’s childhood home and burial place, Althorp Park, will be open to the public. Adult tickets, including the house (about 60 miles northwest of London), grounds and a museum devoted to her life, are about $16; call 011-44-1604-592-020. . . . And for an untraditional Mother’s Day, try a 2 1/2-hour “History of the the Sexual Revolution” bus and walking tour of San Francisco, developed by Playboy Magazine, at 1 p.m. next Saturday and Sunday. It’s free to mothers accompanied by adult children who pay the $14 tour fee. A spokesman called it an “intellectual tour.” Information and reservations: (212) 691-1555.