6) Superconducting Super Collider -$2 billion
In a world where technology keeps evolving, we have such expensive science experiments. The case of Superconducting Super Collider was supposed to be the most expensive science experiment of its time, but something went wrong.
It failed when the government shut it down because it was already too expensive and over the budget. They stopped at $2 billion.
It was constructed in Texas and its goal was to find the Higgs Boson.
Besides, many of the valuable remnants of this failed experiment were sold to the highest bidder.
To this day there are tunnels in Texas where the Superconducting Super Collider would have been housed.
