The Odra, or Croatia's "Amazon river" (as it is often referred to in the local sense), is one of Europe's most important bird habitats.

The Una is a Croatian river with one of the deepest sources on Earth. It's also considered one of the cleanest waterways in all of Europe.

Croatia faces a dilemma as it produces no more than 75 percent of the electricity it needs for its 4.3 million people each year, half of which comes from its dense network of rivers. But to build on ...