Any good documentaries to recommend?

Highly recommend Blue Planet 2, the filming was so good that I, a non-documentary person, fell in love with documentaries. The team ****executed 125 expeditions over the course of 4 years of filming, with over 6,000 hours of underwater filming alone. Compared to Blue Planet 1 16 years ago, this time the production team overcame all kinds of technical difficulties and limitations through new technology, and perfectly presented to the audience many unknown zones and creature moves in the past.