CERN plans even larger Large Hadron Collider
CERN has unveiled plans for an even larger Large Hadron Collider, with a 100km (62-mile) circumference - about four times longer than the current machine.
The Future Circular Collider (FCC) will be almost 10 times more powerful than the current machine too.
https://www.msn.com/en-gb/news/world/cern-plans-even-larger-large-hadron-collider/
Also:
https://home.cern/news/press-release/accelerators/international-collaboration-publishes-concept-design-post-lhc