Learn Spanish (Spain): Los coches están allí.

Allí means "there" or "over there." It is used to talk about a place that is far away from both the person speaking and the person listening. If the cars were close to the speaker, you would use aquí (here) instead.

Why do we use están instead of son?

Even though both estar and ser mean "to be," Spanish has a strict rule for locations. You must always use estar to describe where something is physically located. Since we are stating where the cars are, we use están.

Why does allí have a written accent mark on the "i"?

The accent mark tells you to put the spoken emphasis on that final vowel (ah-YEE). Because the word ends in a vowel, standard Spanish pronunciation rules would normally put the stress on the first syllable. The accent mark is added to override that rule.

Can I drop los and just say Coches están allí?

No, Spanish is stricter than English about this. When a noun is the main subject of a sentence (like the cars are here), it almost always requires a definite article like los (the). Sentences without it usually sound grammatically incorrect to native speakers.