Huge plants in Zagreb!

My first time in Croatia was amazing, i went to its capital,the wonderful Zagreb who has a beautiful botanical garden (Zagreb's Botanical Garden). Visit that place was a really nice experience cause i saw plants and trees i've never seen before in my tropical country, like those at the image, commonly seen at Disney movies and cartoons. It was kinda surprising cause i didn't knew they could get that big! They're really big, i think not only a frog but even a small country could float over there!