YOU SAID:

No river flows to the source.

INTO JAPANESE

ソースに流れ込む川はないです。

BACK INTO ENGLISH

There is no river that flows into the source.

INTO JAPANESE

入ろうにも道が無い

BACK INTO ENGLISH

There is no way into the mountain.

INTO JAPANESE

入ろうにも道が無い

BACK INTO ENGLISH

There is no way into the mountain.