I can't say I've ever been bored while touring, in fact, I'm rarely ever bored while cycling. The one exception I can think of was the Last Chance 1200K randonnee. That was a boring ride ... and even so, it is the only US randonnee I'd be interested in doing again.

Touring is all about exploration ... seeing new things and experiencing new things. When touring, you've often got the freedom to decide where you'll go that day and what you want to see. You can stop and check out tourist attractions, swim in the ocean, take photos of views, have lunch at an interesting cafe, or whatever you want. You can start riding when you want, stop when you want, and go wherever you want.

If the road where you are riding isn't interesting enough for you, pick another road ... or catch a bus or train to another point some distance away and ride there.

There are lots of options ... an no reason to get bored.