If you’re a lover of nature and want to take a bit of time to enjoy the Czech country side during your visit to Prague, one of the most spectacular and easily accessible sights to check out is the Velka Amerika.Czech Grand Canyon is a partly flooded, abandoned limestone quarry near Mořina village, in the Central Bohemian Region of the Czech Republic.It is 800 metres long, 200 metres wide and 80 to 100 metres deep with an 18-metre deep lake on the bottom.