Thank you for the excellent article about Helsinki ("High Season for Helsinki," June 27). Finland is too seldom remembered as one of the most clean, beautiful, peaceful and interesting destinations. I would like to add that the Finnish city of Tampere hosts an annual theater festival--Aug. 10 to 15 this year. It is a real "happening" with street theater, outdoor concerts, open-air dancing and poetry readings. For information, contact the Tampere International Theater Festival; telephone 011-358-3-223-1066, fax 011-358-3-223-0121.