Gravitational wave detection was another big banner experimental result, about ten years ago now https://news.mit.edu/2016/ligo-first-detection-gravitational...

Much of the low-hanging fruit has been picked but there's still interesting experimental work happening. Just in the past few weeks LZ reported an [unconfirmed] detection of dark matter https://www.newswise.com/articles/lz-experiment-sees-surpris...