create a riddle that has the word river as an answer

1 answer

I am a natural flow, deep and wide,
Guiding boats along my side.
With tranquil waters I gently meander,
Reflecting landscapes like a magnificent mirror.

Through valleys and canyons, I gracefully roam,
Carving pathways from mountains to home.
Life thrives along my banks, diverse and alive,
Sustaining creatures who in my waters dive.

Mystery lies within, secrets I conceal,
For ages untold, seekers I reveal.
With tributaries joining in a grand embrace,
Into vast oceans, I bring endless grace.

What am I?