I went to France and got VAT

Okay - look, I took a freaking vacation. I didn't cure cancer or anything. But I did see a lot of skulls. Seriously. Thousands, maybe millions.

The Paris catacombs are cool.

I also strongly recommend going to the Paris Sewer Museum. The displays are impressive - it's truly a very earnest museum. There's lots of good information, it smells pretty decent and the drippy tunnels are cool.