From mighty peaks, formed by powerful natural forces, to one of the last largely intact floodplain landscapes in central Europe; from vast, sunbaked plains that provide refuge for innumerable creatures have only recently returned to the ravines of the border regions – Austria’s national parks were created to protect some of the most diverse, captivating landscapes and fascinating species at the heart of the European continent.

At first glance, the Hudson appears to be just another industrial river. Tree-lined riverbanks are interspersed between cultivated land, bridges, shipping docks, private homes and marinas, factories, chemical plants and brickyards. But go a little deeper and you begin to see sandbars, marshes, waterfalls, lakes and surging rapids. The Adirondacks. The Catskills. Thousands of acres of untamed habitat transform and amaze us with each changing season. It is arguably one of America’s greatest secrets and untold stories. The majestic bald eagle, symbol of the United States, becomes our guide and cinematic touchstone. We will follow the eagle, from courtship to parenting, while moving down the river towards the Atlantic exploring the richly diverse and changing habitats and the profound beauty and challenges to wildlife that come with the changing seasons.

In a hidden realm at the end of the world, amidst the massive mountains of Patagonia's Torres del Paine National Park, a strange story is about to unfold. In the last decade this part of Chile has become a Puma stronghold, but the family of big cats that lives here are behaving in strange ways. Follow the story of packs of pumas hunting together, and learn the story of their family bond.

The world of bugs normally passes beneath our notice, yet shrink yourself to their size, see them in 3D and you’ll enter a world you’d never believe existed. Big Bugs in 3D uses specially developed 3D technology to take the viewer on a global journey, from Mexico and the rainforests of Asia to our own backyards.

People experience adventures on mountains all around the world. Personalities, fascinated by the world of the mountains, bring us closer to the freedom many people experience in such breezy hights.

The River Danube is home to a fish that grows larger than the Great White Shark. Although it leads a secretive life, the Beluga Sturgeon – the King of the Danube – produces the most prized food in the whole world. For over 200 million years, the 8-metre long fish had no enemies, and yet today it is on the verge of extinction. Evolution did not prepare the fish for pollution, river regulation and overfishing. Beluga caviar is traded for up to 20,000 dollars per kilogramme. Ironically, the high price of this precious product could save the animals from a premature disappearance from planet earth.

Termites are underrated. They build high rises without any technical devices that are, according to scale, 25 times higher than the the Empire State Building in New York. They are the only animals that have managed to build an air-conditioning system without electricity. How do they do it?

It is the world's most mysterious manuscript. A book, written by an unknown author, illustrated with pictures that are as bizarre as they are puzzling - and written in a language that even the best cryptographers have been unable to decode.

The climate is changing, global temperature is rising. The impacts are already apparent, especially in the mountains but also in the lowlands. The permafrost zone is shifting higher up and the masses of snow melt whooshing from the glaciers to the valleys are already increasing incessantly. Rivers are going to rise up to powerful floods and dwindle down to extremely low waters the next second.

Terra Mater is a TV film series about nature, science and history.

A documentary about the Walled City of Kowloon in Hong Kong.

Not many people know that there is in the center of Hong Kong, a city of 50,000 inhabitants that escape authority, a city which holds no law and no order, the ‘walled city’. Never before has a television crew been allowed to enter this labyrinth. Christa Wesemann, an Austrian documentary filmmaker, has achieved this for the first time. The recordings from the ‘walled city’ are breathtaking pictures, as it has never seen the world. The history and daily flow in Walled City are ruled by the ‘triad’, a Chinese crime syndicate.

In February of 1918, in Boka Kotorska, the greatest uprising of Austrian sailors broke out. Forty warships, with 6.000 sailors, rebelled against the Austrian Monarchy. The uprising was bloodily crushed after two days, and it's leaders shot.

Berlin, Germany, 1935. The day Karl Weiss, a Jewish painter, and Inga Helms, a Christian woman, marry, is the one in which both of them and the entire Weiss family are caught up in the maelstrom of the Nazi regime, the storms of World War II and the horrors of the criminal Final Solution, the Holocaust, the Shoah; while Erik Dorf, an ambitious lawyer, undertakes his fall into hell at the hands of the sinister Reinhard Heydrich.

Tatort is a long-running German/Austrian/Swiss, crime television series set in various parts of these countries. The show is broadcast on the channels of ARD in Germany, ORF in Austria and SF1 in Switzerland.