Construction has begun on a giant observation tower in the heart of the Amazon Basin to monitor climate change.

亚马逊盆地腹地开始建设一个巨大的了望塔，用于监视气候变化。

And always vigilant were many look-out towers.

许多了望塔总保持警惕。

We headed straight for the observation towers.

直奔了望塔了。

Rooftops and lookout towers are your best bet as they'd be relatively easy to defend.

屋顶和了望塔好的选择， 因为它相对容易防御。

From the observation post, look out upon the eerie silence of the DMZ, the 2.5-mile wide buffer zone that separates the two Koreas.

从了望塔望去 可以看到非军事区的诡异寂静，这块 4 公里宽的缓冲区 将韩国一分为二。

Over the coming years, the barrier was strengthened with spike strips, guard dogs, and even landmines, along with 302 watchtowers and 20 bunkers.

在接下来的几年里，屏障通过钉条、警犬甚至地雷以及 302 个了望塔和 20 个掩体得到了加强。