Příbram's silver-mine train

The city of Příbram, an hour southwest of Prague, was a silver-mine boom town in the 1800s and 1900s. Technically they weren't in the city itself, but a suburb to the west; but they're definitely in Příbram now.

You can visit the mines, just one of so many underground experiences in the Czech Republic. The old shafts are flooded but an old water tunnel is dry (ish) and walkable.

The 600m-long former conduit is surprisingly wide (1m) and high (2m) so even claustrophobes have a chance.

But the highlight of the subterranean jaunt is a ride on the train. The electric-powered loco and carriages used to take the miners deep into the shafts, but now it only runs visitors for a hundred metres or so through some large entrance tunnels.

It's all great fun, and must be a candidate for one of the world's shortest metro systems...