If you go to the Clara Barton House What: Clara Barton National Historic Site When: Hour-long tours start every hour on the hour 10 a.m.-4 p.m. seven days a week except Thanksgiving, Christmas and New Year's Day. Wait for the tour on the front porch. Ring the doorbell if you're late. If you can't fit in a March visit, on April 16 the Clara Barton house will be open 7-9 p.m. and will feature a free one-woman performance about Clara Barton at 7:30 p.m. Where: 5801 Oxford Rd., Glen Echo. How much: Free For more information: go to www.nps.gov/clba or call 301-320-1410 for groups of 10 or more