There's something strange yet intriguing about exploring crypts and vaults. If this sounds interesting to you, pay a visit to Tomb of Yusup Hazi Hajup.
You'll have sightseeing choices galore when in Kashgar. Tomb of Yusup Hazi Hajup is a great place to begin here, but there are plenty of other fine attractions to appreciate. Old Town, Chairman Mao Statue, and Id Kah Mosque are close to the tomb site and will top off your day nicely.