The Ark Two

Why would someone buy 42 school buses, renovate them, then bury them in concrete?

It's called The Ark 2.

Named the Ark Two Fallout Shelter—a biblical reference to Noah's Ark created as a safeguard against future or impending global disasters—it's situated on sprawling land located on the outskirts of Toronto, Canada. The roomy structure consists of dozens of hollowed-out schoolbuses which have been arranged in an intersecting block pattern, and all of this surrounded by reinforced concrete. The complex was built roughly 4 meters underground.

See photos of this thing:

https://interestingengineering.com/this-nuclear-fallout-bunker-is-composed-of-42-school-buses-buried-underground

It even has its own Wikipedia page:
https://en.wikipedia.org/wiki/Ark_Two_Shelter

Seems like a fun little project.  All that concrete....... EXPENSIVE!

Who knows whether the thing will safeguard those inside from nuclear fall-out?  And for how long?

Regardless, it's better than what I've got in my backyard (old septic tank drainage field, grubs, etc.).

Grace & Peace & Love to you all -

Matt