Mina
A distinctive museum
New Taipei City,TaiwanA museum focused on coal mining
Pingxi,TaiwanThe biggest coal mine in Asia
Fushun,ChinaThe former largest open-pit coal mine
Fuxin,ChinaThe salt mine is unexpectedly large and beautiful
Krakow,PolandExploring the Kailu
Tangshan,ChinaEurope's longest wooden slide inside a cave
Hallstatt,AustriaMecca: the cradle of humanity
Mecca,Saudi Arabia1