Speaking of canals, Venice is yet another stunning city that deserves a spot on your travel list. Beyond its decadent pasta and gelato (which is to die for, by the way), the Floating City is renowned for its flamboyant architecture, sigh-worthy bridges, and lovable stripes-sporting gondoliers . . .
Sadly, Venice may not even exist 20 years from now (due to rising sea levels), so be sure to visit this painfully romantic Italian town as soon as possible in your 20s — before it sinks into the ocean.