when visiting slovenia, you will certainly find out that visiting one of the huge karst caves in the western region of the country is the most popular attraction near ljubljana. i’m sure there’s more than two, but the two biggies are postojna (post-oy-na) cave and škocjan (skoe-tsian) cave. they’re both huge, as in, some of the largest caves in europe.  they’re both firmly on the tourist trail. but upon duly doing my research as i am want to do, i discovered that postojna is definitely the most popular choice and therefore, much more crowded. it’s a bit larger than škocjan, more well-lit, and you tour by riding in a train…