There's something mysterious yet gripping about exploring crypts and vaults. If this sounds interesting to you, have a look at Golfa Sharif Mausoleum.
Located in E-11 Sector, this tomb site is well worth a look. But you'll find plenty more to explore in the area. Centaurus Mall, Faisal Mosque, and Margalla Hills National Park aren't too far away from Golfa Sharif Mausoleum.