Tick + Eiffel Tower — Paris Sites
What do a tick and the Eiffel Tower have in common?
They're both Paris sites.

Explanation:"Parasites" (ticks) sounds like "Paris sites" (places in Paris).
What do a tick and the Eiffel Tower have in common?
They're both Paris sites.

Explanation:"Parasites" (ticks) sounds like "Paris sites" (places in Paris).
DAD JOKES