This abandoned mall in Bangkok was once called “New World.” As more time passes, the name becomes more ironic. But in its dilapidation, something beautiful has occurred.

After the mall was shut down, the sunken first floor filled with rainwater and became a shopping mall-shaped lake. But that's not the cool part.

Locals put a few catfish and koi in the water to reduce of the mosquito problem that the new pond created. And incredibly...

...A few fish became many, and over the years this pond became a lush ecosystem that supports more fish than anyone could have expected.

This is the kind of setting that is often poetically depicted in post-apocalyptic movies wherein humans are not around to stop nature from bringing the landscape back to its green and wild equilibrium.

Thousands of fish swim in what used to be the bottom floor of a bustling shopping center. They may swim above old mannequins, statues, and benches.

Given enough time undisturbed, nature tends to reclaim all things.