(The) Countryside, (The) Seaside

[bagzi94]

I want to live in countryside.
I want to live in the countryside.

I'm going to seaside.
I'm going to the seaside.

Do I need the if I'm not talking about a specific place?

 

[SoothingDave]

Yes, you need a "the."

 

[bagzi94]

Thank you! Are you able to tell me why do I need it? What's the rule?

 

[SoothingDave]

When used as a noun, those words always have a "the."

You might say "It's a lovely seaside restaurant" but that is using the word as an adjective.

You would not say "I like living by a seaside" or "...by seaside." You can only say "I like living by the seaside."