1. Mountains - Nature blessed Pakistan with abundant and varied natural wonders, as the country holds five of the highest 14 independent mountain peaks in the world, and has more than 60 peaks at 22,000 feet (7,000 meters) or more. Main mountain ranges of Pakistan are Himalaya, Karakoram, Hindu Kush, and Sulaiman Mountains. Most of the highest peaks of Pakistan are in Karakoram, including the National Mountain of Pakistan the K2 (8,611m), second highest in the world. Accessibility to these mountains is naturally quite difficult, although well worth the time and effort if you're a mountain lover. This link will offer you all the information you need on mountain expeditions in Pakistan.
2. Karachi - teaming with almost 12 million people, Karachi is Pakistan's largest city and the 13th largest in the world. As one of the great melting pots of Asia, one will see people in abundance of every race and religion. The city can trace its history at least as far back as the time of Alexander the Great, and there are numerous museums in Karachi where you can see artifacts from the various stages of development throughout the millennia. Karachi is situated on the Arabian Sea, and has many beautiful beaches. Most major internationl airlines fly to Karachi
3. Mohenjo-daro - This is an archeological treasure a few hours drive from Karachi, and must be seen if you're there for more than a day. Moen Jo Daro dates back to 3,000 B.C., making it one of the earliest recorded civilizations in the world. The remains show an advanced civilization that had detailed urban planning. Streets ran in a grid, and there were separate areas for government buildings and residences.