YOU SAID:

I found out there was a park across the street

INTO JAPANESE

通りの向かいに公園があることがわかりました

BACK INTO ENGLISH

I found that there is a park across the street

INTO JAPANESE

通りの向かいに公園があるのを見つけました

BACK INTO ENGLISH

I found a park across the street

INTO JAPANESE

通りの向かいに公園を見つけました

BACK INTO ENGLISH

I found a park across the street