It’s said the Bosphorus is phosphorous.
And that the River Dee is rather twee.
I believe the Severn is just like Heaven.
The Thames is a UK gem if you ask me.

Crossing the Rio Grande should be well-planned.
The current in the Mekong is rather strong.
Being on the Nile will surely make you smile.
While a day on the River Mersey can’t be wrong.