Skocjan Caves in Slovenia. One of the largest underground canyons in the world with the Reka river still carving through it. At 60 meters wide and 140 meters deep, this canyon is a fraction of the Grand Canyon’s size, but the fact that it’s all underground makes it feel bigger. When you cross the canyon via the narrow Hanke Canal Bridge, you’ll see the roaring river far below.
10 most underrated cities in Europe: #3 Ljubljana, Slovenia It’s no wonder anyone who has stepped foot in the Slovenian capital will tell you this is the prettiest city in all of Europe (even competing with Paris!). The picture speaks for itself, but there truly is no city like Ljubljana, earning it third position on the list.