This may sound unbelievable, but I've ...
You will find this hard to believe, but I've already ...
You'll find this hard to believe, but I've always been interested in ...
You may not believe this, but I've never been to ...
I know it's hard to believe, but I've never ...
You may not believe this, but I've walked ...
Believe it or not, I've had ...
As amazing as it sounds, I haven't seen ... yet.
You may not believe me, but I've never tried ...
You may not believe this, but I've ...
You won't believe this, but I've just ...
I know it's hard to believe, but I've seen ...
This may seem hard to believe, but I've taken part in ...
You won't believe this, but I've met ...
You won't believe this, but I've worked ...
This may sound unbelievable, but I've ridden ...
As amazing as it sounds, I've never made ...
You'll never believe this, but I've visited ...
This may seem hard to believe, but I've been to ...
You'll never believe this, but I've always liked ...
You may not believe this, but I've gone ...
Would you believe, I've never had ...
This may seem hard to believe, but I've never liked ...