Valley
A narrow strip of land surrounded on 3 sides by water is a peninsula.
A ravine is a narrow, deep valley with steep sides typically formed by water erosion. It is often characterized by its rugged terrain and lack of vegetation.
A rift valley has steep narrow sides and a flat floor. A rift valley forms where the Earth's crust is spreading or splitting apart.
A narrow piece of land jutting out into a body of water, usually low-lying, is called a peninsula. Peninsulas are usually surrounded by water on three sides and connected to a larger landmass by a narrow strip of land.
The word you are looking for is "trench." Trenches are long and narrow depressions in the seafloor characterized by very steep sides.
A gorge is a deep narrow passage with steep rocky sides.
A gorge is a deep narrow passage with steep rocky sides.
Gorge can be a noun or a verb. Noun: A deep and narrow passage with steep, rocky sides. Verb: To eat greedily.
A canyon or chasm
There is cheese in cheddar gorge because it is there to ripen and that's why it is called cheddar gorge
A narrow strip of land surrounded on 3 sides by water is a peninsula.
A narrow neck of land is called a peninsula. A peninsula is bordered by water on three of its sides.
Straits are narrow, yet still navigable channels of water connecting to open water on both sides. It can also be know as a channel of water.
It's called a fjord.
It is called an isthmus
fjord
Such structure could be called a Canyon.