Wyjscie Salt Mine.

They have been mining salt here since the 12th century and it is enormous.
The source of one third of mediaeval Poland's total revenue it still produces 8,000 kilos a year but that's just to sell to the tourists.
Only 2 of the 20kms of tunnels are a open to tourists. That’s the 2 million that visit each year.
To get to the first level at 64 metres you walk down 380 stairs. There are 800 by the time it’s all over.
Absolutely amazing. Chapels, reception rooms, stairs and stairs. One room is over 35 metres high, they used to do bungie jumping a few years ago.
In the middle ages there were 60 horses stabled underground and hundreds of workers.
Condition have improved since the. Now there are just 400 guides.Read more