A passage through a hill ; underground, is called a TUNNEL.
However, a passage between two hills (surface) is a VALLEY.
A passage between two hills is dependent on its width. If the hills are low and far apart, then it is a VALE. However, if the hills are high and close together then it is a GLEN or RAVINE, or GORGE.
it is a hill
A horizontal mine shaft is called an adit. en.wikipedia.org/wiki/Adit
A large hole in the side of a hill or mountain or in the ground is called a cavern or a cave. These natural formations can be created through various processes like erosion, weathering, or volcanic activity.
A rock or metal that plummets through the atmosphere and falls to Earth is called a meteorite. When a meteoroid survives its passage through the atmosphere and lands on the Earth's surface, it is referred to as a meteorite.
A steep hill with a flat top that stands alone is called a mesa. This geological formation is typically found in arid regions and is characterized by its distinct flat summit and steep sides. Mesas are created through erosion and weathering processes over millions of years.
A passage through a hill is typically called a tunnel. It is an underground passageway that cuts through the hill, allowing for easier transportation or access.
A tunnel
A narrow passage through land is called a gorge.
It is a tunnel.
A tunnel-like passage through a bone is called a canal or a meatus. This structure allows for the passage of nerves, blood vessels, or other structures through the bone.
To enter through the back secret passage of the hill.
The passage way through mountains is called a mountain pass. It is a route through a mountain range that allows for travel between different regions.
A passage through a mountain is called a tunnel. Tunnels are typically constructed to provide a direct route for transportation through a mountain, enabling easier navigation for vehicles and pedestrians.
The passage of energy through something is called energy transfer. This can involve the transfer of heat, electricity, or other forms of energy from one object to another.
The Northwest Passage Apex;;;
it could be a valley or a gorge
The passage of light through an object is called transmission. This process occurs when light passes through a material without being absorbed or reflected.