YOU SAID:

we have never been up here and therefor we are now astonished

INTO JAPANESE

私たちはここに来たことがないので、今は驚いています

BACK INTO ENGLISH

I'm surprised now because we've never been here

INTO JAPANESE

私たちはここに行ったことがないので今驚いています

BACK INTO ENGLISH

I'm surprised now because we've never been here