1. Matterhorn is one of the highest peaks in the Alps, with an elevation of 4,478 meters. It is located on the border between Switzerland and Italy and is a popular destination for mountaineers and skiers. The mountain is known for its distinctive pyramid shape and its challenging climbing routes. Interlaken, on the other hand, is a small town located in the heart of the Swiss Alps. It is known for its picturesque landscapes, ski slopes, and hiking trails. Visitors can also enjoy a variety of adventure activities such as bungee jumping, paragliding, and canyoning.

2. The Matterhorn is open year-round, but the best time to visit is during the summer months (June-September) when the weather is favorable for hiking and climbing. There is no phone number available for the Matterhorn, but information can be found on their website. As for Interlaken, most of the tourist attractions are open year-round, but some may have seasonal hours. Visitors can contact the Interlaken Tourism Office for more information.

3. Ticket information for the Matterhorn varies depending on the activity. For example, climbing permits must be obtained in advance and can be reserved through the website. Ski passes can be purchased at the ski resort. The best way to access the Matterhorn is by train or car, and there are several transportation options available. As for Interlaken, visitors can purchase the \"Interlaken Guest Card\" which provides discounts on transportation and admission to certain attractions. The town can be easily reached by train or car, and there are several parking lots available for visitors.