I personally am a huge fan of Avatar the last airbender and I absolutely recommend it to everyone.
Water, earth, fire and air.
These are the four elements which on all of the story is based.
There are people in every single nation who can only bend one of these four elements depending on which nation they live in.
But the avatar is an exception, he is capable of bending all four elements.
When the time comes and Aang finds out he is the avatar, he vanishes and gets stuck in a giant ice in which he and his bison are safe.
Fire nation starts to attack other nations and expands the shadow of its power over the other nations.
After 100 years, a girl called Katara and her brother( Sokka) find Aang and rescue him.
Now that everything has changed and Aang is free, he should bring peace into the world.
This is an incredible-must watch serie.
Great visual aspects, mythical background, spiritual demonstration, great characterization for both protagonists and antagonists, wise quotes, precise demonstration of martial arts, incredible plot, masterful ending and amesome composings making the show a harmonized and perfect serie, are some of the features you'll get through the show.