Learn Dutch: Buiten is het uitzicht op de horizon prachtig. - Outside, the view of the horizon is beautiful.

Buiten indicates a static location (outside). Because the sentence just describes where the view is, with no movement from one place to another, we use the absolute spatial adverb buiten. If you were talking about moving from inside to outside, you would use the directional phrase naar buiten.

Why is the verb is placed immediately after Buiten?

This is a reminder of the V2 (verb-second) rule. When you start a sentence with an adverb like Buiten, the verb must still take the second position. As a result, the verb (is) and the subject (het uitzicht) swap places, which is called inversion.

The English translation says 'view of the horizon'. Why does the Dutch sentence use the preposition op?

Prepositions rarely translate word-for-word between languages. In Dutch, the fixed combination for having a view of or over something is uitzicht op. You will also see this in common phrases like uitzicht op zee (view of the sea).

Could I put buiten later in the sentence?

Yes, you could write Het uitzicht op de horizon is buiten prachtig. Putting Buiten at the very beginning of the sentence is a stylistic choice that places extra emphasis on the location, translating nicely to 'Outside, the view...'.