World’s oldest show cave - Postojna, Slovenia

In proof positive that vandalism has its uses, the Postojna Cave in Slovenia has utilised careless graffiti artists to get itself into the record books.
Incredibly, it has been a tourist attraction since 1213, which is the earliest date identifiable from visitors’ etchings on the walls. This makes it the world’s first show cave.
Whilst an unfortunate amount has been destroyed by candles, torches and thoughtless scribbling, a huge system still remains, and due to lashings and lashings of calcium carbonate, there are some incredible features. These include a giant ‘diamond’ column.
The highly popular tours are available year-round.

More information: Postojna Cave