Gaudi or Gaudy?

So my mom called this morning.  She's in the middle of planning her trip to Spain and wants to visit Barcelona while there.  Apparently she was researching on the internet in an attempt to find the "architecture" worth seeing in Barcelona.   So our phone conversation went something like this:

Mom:  I typed in "architecture in Barcelona" and all that keeps coming up is this Gaudi stuff.  Do you know him?

Me:  Yes, he did a lot of the known architecture in Spain.

Mom:   Well it all looks like piles of mud.   Aren't there any historic cathedrals or anything?

Me:   I'll get online and see what I can find for you.

Turns out, mom is just as good at internet research as I am.

Gaudi's Sagrada Familia Cathedral in Barcelona