Trekking is the most popular tour in Nepal, if that is what you’re after then check with your travel agent about reputable companies. In terms of sightseeing around the Kathmandu Valley the company Wayfarers (Chaksibari Marg, Thamel, +9771 4266010) is a reliable operator. Their tours range from 4 day to 6 days in length. They involve tours of old Kathmandu, Swayambhunath stupa and Patan with afternoon excursions of Bhaktapur and a drive to Nagarkot. However for something different try a guided mountain bike trip. Depending on the company, high quality bicycles, local and Western guides, helmets and other equipment are provided. Popular routes on offer are: Budhanilkantha – Chisopani – Nagarkot and back; Kathmandu to Chitwan National Park via Daman and Hetauda and even a four day tour of the Tibetan border.