Boston, USA back out from there bid for the 2024 Olympics. Why? Because of the expensive cost of building new stadiums and other sports related that will be a big burden to the taxpayers. Also maybe they see that every after Olympics the infrastructure made for event will be stall unless someone have an event at that specific place.
There is this idea that circulating the internet that why don't we put the Olympics in Greece. In the place where it all started? It will cut the cost of organizing the Olympics every 4 years.