Expression for a still body of water that captures pleasant atmosphere

I am searching for a word or expression that describes a still body of water, perhaps a lake. The expression should preferably also capture the pleasant atmosphere of no waves and minimal sound.


Solution 1:

I would suggest placid:

having a calm appearance or characteristics

calm and peaceful

Cambridge Dictionary

There is even a a lake called Lake Placid.

There is also a movie called Lake Placid (but in this case, the title is ironic).

Solution 2:

How about tranquil?

free from disturbance or turmoil