Agrasen ki Baoli, Delhi

The 14-century Agrasen ki Baoli at Hailey Lane in central New Delhi, a 60-metre-long, 15-metre-wide, 108-step stepwell cut into the sandstone, traditionally attributed to the legendary Maharaja Agrasen (c.5-century BCE). The surviving architectural form is 14-century Tughlaq-period, with distinctive straight-flight architecture (unlike the spiral baolis of Rajasthan). The adjacent 14-century mosque at the top gallery and the 60-metre central shaft that may have held a water-wheel preserve the medieval water-architecture ensemble. ASI protection since 1958. The baoli has gained Instagram fame as a 'horror tourism' site since the 2010s.