The in-laws have peeked at The Peak, shopped till they dropped at Stanley market and sweated up the steps leading to the Big Buddha on Lantau. How can you get them out of the house - and your hair - and keep them entertained? How about a harbour cruise on a traditional Chinese junk? And, even better, how about it being free? Every Thursday afternoon, the Hong Kong Tourism Board (HKTB) offers four cruises on Victoria Harbour aboard the Duk Ling. The iconic red-sailed boat is thought to be the last authentic sailing junk in the SAR. Passengers can choose to depart either from the Kowloon public pier in Tsim Sha Tsui at 2pm or 4pm, or from Queen's Pier, Central, at 3pm or 5pm. Although the cross-harbour cruise lasts only 40 minutes, visitors can take in the stunning 360-degree views of the city skyline before disembarking at the opposite side. Only visitors to Hong Kong are allowed on board and they are advised to book one to two weeks in advance - the Duk Ling can carry only 30 people. To register, tourists should take their passport to a HKTB visitor information centre (Star Ferry Concourse, Tsim Sha Tsui; The Centre, 99 Queen's Road Central; 2/F, Lo Wu Terminal Building, Lo Wu; at Hong Kong International Airport). For information, call 2508 1234.