The correct answer is option 3: Gol Gumbaz. Bijapur is known for its magnificent architectural wonder called Gol Gumbaz. Gol Gumbaz is a mausoleum located in Bijapur, Karnataka, India. It was built during the rule of the Adil Shahi dynasty in the 17th century.

Gol Gumbaz is famous for its unique and impressive dome structure, which is the second largest dome in the world after St. Peter`s Basilica in Rome. The dome is known for its acoustic properties, creating a whispering gallery effect where even the softest sound can be heard from across the hall. The mausoleum also houses the tombs of Muhammad Adil Shah, his wives, and other family members.

Although Bijapur is a city in Karnataka, Heavy rainfall and Severe drought condition are not the primary characteristics that it is known for. Similarly, while Bijapur may have other notable attractions like the Statue of Gomateswara or other historical sites, these are not specifically associated with its fame.