The Arboretum offers a unique exhibition of cacti, including over 1000 plants from the collection of Dušan Hrovatin. The collection is special because of the variety of specimens and their age, so the exhibition will certainly not leave you indifferent. The oldest specimen in the greenhouse is already 50 years old. In addition to cacti, the greenhouse offers succulents, bulbs, milkweeds, tillandsias, crystals, bulbs and live pebbles. The latter are famous for their ability to camouflage - they are the chameleons of the plant world, as their colour adapts to the colour of their surroundings.