It's called a fjord
It sounds like the question describes a fjord.
fjord
Ria
A narrow inlet is a strait.
Fjords
The fjords of Norway.
Norway is famous for its stunning fjords, with the most famous being the Geirangerfjord and the Nærøyfjord. These long, narrow inlets of the sea are surrounded by steep cliffs and offer breathtaking scenery for visitors.
An example is a Norway fjord.
One example are the Western Norway Fjords.
Norway is well-known for its steep-sided inlets called fjords. These geological formations are created by glacial erosion, resulting in deep, narrow bays surrounded by towering cliffs. The country's coastline features some of the most stunning fjords in the world, attracting tourists and nature enthusiasts alike. Other countries with fjords include New Zealand, Canada, and Chile, but Norway is the most famous for them.
narrow. Also long.
Fjords are typically found in coastal regions with mountainous terrain, such as in Norway, Iceland, Greenland, Alaska, and New Zealand. They are formed by glacial erosion, creating deep, narrow inlets with steep cliffs on either side.
Norway
fjord fjord
Fjord
Norway is a country known for its majestic fjords, such as the popular Geirangerfjord and Nærøyfjord. These long, narrow inlets carved by glaciers offer breathtaking views of steep cliffs, waterfalls, and crystal-clear waters, making Norway a popular destination for fjord sightseeing.