'An ancient structure, the Gol Gumbaz is a prominent historical monument in Bijapur. Built in the 17th century, it houses the tomb of the city’s legendary ruler, Adil Shah. It is especially renowned for the architectural finesse of its Indo-Islamic style structure. The dome is believed to be the second largest in the world, after St. Peter’s Basilica in Vatican. This monument is worth visiting for the acoustic appeal of a few of its chambers. The Whispering Gallery is where even the softest of sounds can be heard at a distance and the central hall is where sounds echo seven times.'