The Great Icelandic Swim with Ross Edgley

Glittering facades, vibrant life, and people facing the daily struggle for survival. ZDF correspondents each profile a megacity within their reporting area. How do people celebrate, laugh, and love in such a city? How are problems like housing shortages, food supply, transportation, and climate change solved – in metropolises with over ten million inhabitants?

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Michael Palin travels to 18 countries around the rim of the Pacific Ocean.

Michael Palin attempts to copy the exploits of fictional character Phileas Fogg, by trying to travel around the world (without flying) in 80 days.

Michael Palin undertakes an epic journey of 23,000 miles, traveling from the North to the South Pole across 17 countries with a minimum of air travel, all on a tight deadline.

In this four-part BBC documentary, former Monty Python funnyman and renowned globe-trotter Michael Palin sets off from Gibraltar to travel across the Sahara, his witty humor downplaying the hardships he faces along the arduous journey. He travels to Morocco, Mauritania, Mali and beyond, across some of the harshest terrain on the planet.

Two ultra athletes. Five months. Eight of the toughest endurance races in the world. With the globe as their playground, friends and fierce competitors Simon Donato and Paul “Turbo” Trebilcock aim to prove that boundaries are meant to be broken. The docuseries chronicles both pain and triumph as Turbo and Simon climb, run and bike up anything they can find over five straight months of extreme challenges. Will they finish all eight races and make it through this ultimate test of mind, body and spirit?

The sexual behaviour and intriguing reproductive strategies of the animal world.

Hall of Fame professional wrestler Steve Austin invites eight elite athletes to his ranch each week to compete in head-to-head battles until only one is left standing. That man or woman then takes on Steve's personal obstacle course, the Skullbuster, for a chance to win $10,000.

David Attenborough celebrates the amazing variety of the natural world in this epic documentary series, filmed over four years across 64 different countries.

Profiles of some of the men who choose to live off the grid in the unspoiled wilderness, where dangers like mudslides, falling trees and bears are all part of everyday life.

Viewers go deep into an Alaskan winter to meet six tough and resilient residents as they try to stay one step ahead of storms and man-eating beasts to make it through to spring. The closest neighbor to Sue Aikens is more than 300 miles away. Eric Salitan subsists solely on what he hunts and forages. Chip and Agnes Hailstone catch fish for currency in bartering for supplies, and Andy and Kate Bassich use their pack of sled dogs for transportation.

Australian host Steve Irwin and his wife Terri run a wildlife refuge. Their shared passion is educating the world about wildlife, including the much feared crocodile and numerous venomous snakes. Steve's specialty is the capture and relocation of crocodiles. No animal appears too threatening to Steve, his true respect for animals is the foundation for everything he does.

Natural World is a nature documentary television series broadcast annually on BBC Two and regarded by the BBC as its flagship natural history brand. It is currently the longest-running series in its genre on British television, with more than 400 episodes broadcast since its inception in 1983. Natural World is produced by the BBC Natural History Unit in Bristol, but individual programmes can be in-house productions, collaborative productions with other broadcasters or films made and distributed by independent production companies and purchased by the BBC. Natural World programmes are often broadcast as PBS Nature episodes in the USA. Since 2008, most Natural World programmes have been shot and broadcast in high definition.

Bear strands himself in popular wilderness destinations where tourists often find themselves lost or in danger.

Some of the most amazing, eye-opening and downright scary paranormal videos from around the world are featured as a panel of experts break down the footage and analyze what exactly the eyewitnesses captured.

Set in Central Michigan's farm country, this reality series follows the work done at Pol Veterinary Services. Specializing in large farm animals, Dr. Pol treats horses, pigs, cows, sheep, alpacas, goats, chickens and even an occasional reindeer. The program also features Dr. Brenda Grettenberger, who has worked with Dr. Pol since 1992.

Experience our planet's natural beauty and examine how climate change impacts all living creatures in this ambitious documentary of spectacular scope.

Actor Zac Efron journeys around the world with wellness expert Darin Olien in a travel show that explores healthy, sustainable ways to live.

Inspired by his late mentor, Will Smith spends 100 days facing extreme challenges, venturing from pole to pole with scientists, explorers and experts.