There are frequent passenger and vehicle services on other cross-harbour routes. The outlying islands are served daily by ferries and hydrofoils. However, the opening of the Cross Harbour Tunnel means that wallah wallahs are decreasing in popularity. Tours of the harbour and to Aberdeen and Yaumatei typhoon shelters are available by Watertours junks, and visits to outlying islands are possible by public ferry. Ferries sail to Tuen Mun, Sha Lo Wan, Tai O, Discovery Bay and Cheung Chau.
Weekdays are the best time to go, since ferries tend to be very crowded at weekends.
It is more expensive than the ferry, but quicker, particularly for those travelling further into Kowloon than Tsimshatsui or to Lantau Island. Trains run between 0600-0100. The price includes a map and souvenir ticket. For visitors staying for a week or more it is worth getting an Octopus Card , an electronic ticket from which the cost of the journey is automatically deducted when it is placed on a sensor. Any other credit remaining is also refunded when the card is handed in.