Just outside the administrative boundaries of Kraków, some 14km southeast of the city centre, Wieliczka (vyeh- leech -kah) is famous for its ultra-deep Salt Mine, which has been in continuous operation for 700 years and can be visited. It’s an eerie world of pits and chambers, and everything has been carved by hand from salt blocks. The mine was included on Unesco’s World Heritage List in 1978.