The Best Nature Documentaries Ever Made, Ranked by Rewatchability

Some documentaries impress you once. A rare few pull you back again and again, even when you already know what happens. That's the difference between a great nature documentary and one that becomes comfort viewing.

With streaming services constantly surfacing wildlife content, it's easier than ever to revisit the classics. But not every stunning shot translates into long-term rewatch value. The documentaries that last combine breathtaking cinematography with memorable storytelling, surprising animal behaviour, and the kind of moments you can't stop showing friends.

The Rewatchability Test

Rewatchability isn't the same thing as scientific importance. A documentary can be informative and still feel like homework on a second viewing.

The titles below were ranked based on four factors: visual spectacle, storytelling, emotional impact, and how likely you are to throw on a random episode after a long day. Production quality matters, but so does personality. That's why some older entries still outrank newer releases with bigger budgets.

One more thing: series and feature-length documentaries are competing together here. If you'll happily watch them multiple times, they qualify.

The Rankings

1. Planet Earth II (2016)

If you're picking a single nature documentary series to rewatch for the rest of your life, this is probably it.

The BBC sequel arrived a decade after the original Planet Earth and somehow managed to raise the bar. The famous iguana-versus-snakes chase on the Galápagos Islands remains one of the most talked-about wildlife sequences ever filmed. Narrated by David Attenborough, the series combines cinematic camera work with stories that feel almost scripted.

Its IMDb rating sits around 9.5/10, which is unusually high for any television series, documentary or otherwise.

2. Blue Planet II (2017)

The ocean has always been difficult to film well. Blue Planet II made it look effortless.

Across seven episodes, viewers witnessed hunting strategies, deep-sea creatures, and behaviours that had rarely been captured on camera. The series also helped spark wider public discussion about plastic pollution, particularly after several episodes highlighted the scale of waste reaching marine environments.

You can watch it for the education. Most people return for the visuals.

3. My Octopus Teacher (2020)

This is the most emotional entry on the list, and that's exactly why people revisit it.

The documentary follows filmmaker Craig Foster as he develops an unlikely connection with a wild octopus off the coast of South Africa. Released on Netflix in 2020, it went on to win the Academy Awards for Best Documentary Feature.

Some nature fans find it overly personal. Others consider that personal angle the entire point. Either way, it stays with you.

4. Planet Earth (2006)

The original still deserves a place near the top.

When it debuted in 2006, the series reportedly cost approximately $25 million to produce, making it one of the most ambitious nature documentaries ever created at the time. Some of the footage shows its age, especially compared with modern ultra-high-definition productions.

But the sense of discovery remains intact. That's why so many viewers keep coming back.

5. March of the Penguins (2005)

A documentary about penguins shouldn't be this compelling.

Yet audiences around the world connected with the annual migration and survival struggles of emperor penguins in Antarctica. The film earned roughly $130 million worldwide at the box office, an extraordinary figure for a nature documentary.

It's also shorter than most entries here, which makes it an easy recommendation when you're not ready to commit to an entire series.

The Part That Separates Good from Great

The highest-ranked nature documentaries understand that facts alone aren't enough.

Think about the scenes people remember years later. It's the baby iguana escaping hundreds of snakes. It's a diver forming a bond with an octopus. It's emperor penguins enduring conditions that would kill most animals within hours.

The science matters. But stories create memory.

That's also why some technically impressive productions don't become perennial favourites. You admire them once, then move on. The documentaries above create emotional investment without turning wildlife into fiction.

And that's much harder to do than it looks.

Why You Should Care

Even if you don't consider yourself a documentary fan, these films and series offer something most entertainment struggles to provide: genuine surprise.

You already know how a superhero movie ends. You probably know who survives a crime drama. Nature documentaries operate differently. Real animal behaviour can be stranger, funnier, and more suspenseful than anything a screenwriter could invent.

They're also some of the easiest shows to revisit. You can watch an entire season or drop into a single episode while eating dinner. Either way, they still work.

What to Watch Next

If you've already worked through the rankings above, there are a few excellent follow-ups worth adding to your watchlist.

Start with Frozen Planet II (2022), which brings modern filmmaking techniques to some of Earth's harshest environments. Then try Our Planet (2019), Netflix's large-scale wildlife series narrated by David Attenborough. Finally, check out Prehistoric Planet (2022), which blends current paleontology research with wildlife-documentary storytelling to imagine how dinosaurs may have behaved.

The best nature documentaries don't just show you another corner of the planet. They remind you that the real world is often stranger, funnier, and more dramatic than the fiction competing for your attention.