Season 4

The pristine land of President Lincoln's favorite state is under threat like never before as developers, conservationists and cowboys battle for territory.

Global warming is dramatically altering the landscape — and the prospects — of the world's largest island.

As surging seas and frequent floods batter America's most historic city, the fight is on to save beautiful Charleston and its storied past.

The global shutdown gave Hawaii's fragile islands a chance to recover from the effects of surging tourism. Can a new balance be struck to protect the island?