Want to go somewhere cool? Visit the Skocjanske jame caves in Slovenia.

http://www.park-skocjanske-jame.si

They are located just 20 km from Trieste, they offer a unique spectacle, it is the largest canyon in Europe, tickets are sold online as tourists come from all over the world, adults €24.

Park Skocjanske Jame Skocjan 2 Divaca.

The site is a UNESCO World Heritage Site.