As regards military submarines meant as warships, the Russians built the submarines with the deepest diving capability, but U.S. submarines generally make less noise.
taku
What is the deepest part of the world’s oceans and how deep is it?
The worlds deepest snowfall in the world was 110.663 feet deep and was in Canada
The Marianas Trench in the Pacific is the deepest place on earth
The USS Nautilus (SSN-571) was the US Navy's first nuclear powered submarine.
Anna coe
23cm deep
The Mariana Trench,... in the Pacific ocean.
The World's deepest bellybutton is approximately 10' 7" deep. People have gotten lost and died in there!
The worlds deepest road tunnel to date is the Eiksundtunnel in Sunnmøre, Norway 287 meters below sea level.
The world's deepest pool is the DeepSpot in Poland, which has a maximum depth of 148 feet (45 meters). It holds over 280,000 cubic feet of water and is used for scuba diving training, recreational diving, and underwater filming.
Lake Baikal.