There's something spooky yet appealing about exploring crypts and vaults. If this seems interesting to you, take a look at Mausoleum of Chu Dynasty.
You're spoiled for sightseeing choice in Yunlong District. Mausoleum of Chu Dynasty is a good place to begin here, but there are lots of other worthy attractions to appreciate. Western Han Dynasty Terracotta Warriors, Xuzhou Museum and Baolian Temple are not far from the tomb site and will top off your day nicely.