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It's the land we love and the land we think we know. We see America's breathtaking landscape

A fearless ocean adventure team dives into one of the planet’s most spectacular and remote places, b

“国家地理探险家”贝尔蒂·格雷戈里将带领观众近距离进入野生世界中最壮观及神秘的角落。

克里斯·海姆斯沃斯亲身挑战六个人生中最严峻的考验，激发身体超能力与时光较量，探索健康长寿的奥秘。