The Red Fort and Taj Mahal are both famous landmarks in India, but they are quite different from each other. The Red Fort, also known as the "Lal Qila," is a historic fort in the city of Delhi that was built in the mid-17th century. It is made of red sandstone and is a UNESCO World Heritage Site. The Taj Mahal, on the other hand, is a mausoleum located in Agra, Uttar Pradesh. It was built in the early 17th century and is also a UNESCO World Heritage Site. It is made of white marble and is considered one of the most beautiful buildings in the world. So, the main difference between the two landmarks is their location, the materials they are made of, and their purpose.