If I click a tag I follow from the main page, I get no results:
This isn't happening on other SE sites. What's up?
It says it right there :-)
You are on the Featured tab. There are no questions with an active bounty at the moment. Perhaps you'd like to select a different tab?
You are probably looking at
https://travel.stackexchange.com/questions/tagged/venice/?sort=featured, that's why you don't see anything. Remove the last bit and everything works as advertised.
Don't sweat it, I have been stumped by this once or twice before as well. :-)