There are many treasures hidden below Haloze. Their creation is linked to a 280-million-year old grey sedimentary rock called limestone.

In the mass of limestone to the southeast of Poljčane and southwest of Makole, there are number of karts formations and phenomena.There we can find typical geomorphologic formations – funnel-shaped holes, ponors, chasms and the largest “Styrian” cave – the Belojača.

In places where limestone comes into contact with much younger, merely 20-million-year old rocks, “black gold” has accumulated in the geological past. In the first part of the 20th century, the coal industry was the main source of income for many families in this region. The Makole coal mine with its sectors Sega and Hrastovec-Kleče stopped operating in 1963.

It left behind an ethnological, historical and technical legacy, while a “new” legacy is being created in the abandoned mine shafts – a legacy of numerous micro-karst formations (karst spring in Studenice, funnel-shaped holes and chasms in the area of Leneš, the Belojača cave) and micro-karst formations in abandoned mine shafts.