Čim stignemo, obići ćemo znamenitost sa turističkim vodičem.

Čim means as soon as or the moment. It introduces a time clause and suggests immediate sequence:

• Čim stignemo... = As soon as we arrive...

It is a bit stronger and more immediate than kad (when).

That is very normal in Serbian.

After time words like čim, kad, dok, Serbian often uses the present tense in the subordinate clause even when the meaning is future.

So:

• Čim stignemo, ... literally uses present tense
• but the meaning is As soon as we arrive, ...

English does something similar: we say When we arrive, we’ll..., not When we will arrive.

Stignemo is the 1st person plural present form of stići (to arrive).

So it means:

• we arrive
• or in this kind of sentence, when we arrive

The ending -mo tells you the subject is we, so Serbian does not need a separate pronoun like mi unless you want emphasis.

This is the Serbian future I form:

• infinitive / future stem + ćemo = we will

Here the verb is obići (to visit / go around / tour), and ćemo means we will.

With verbs ending in -ći, Serbian normally writes the future like this:

• doći ću
• proći ćemo
• obići ćemo

So obići ćemo is the normal form.

Not quite. Obići usually means to go around, to visit, to tour, or to look around thoroughly.

In this sentence, it suggests something like:

• we’ll visit/tour the landmark

It often implies a complete visit, not just a quick glance.

Also, obići is a perfective verb, so it presents the action as a whole, completed event.

Znamenitost means landmark, sight, or attraction.

In this sentence it is the direct object of obići ćemo, so it is in the accusative singular.

For this noun, the nominative and accusative singular look the same:

• nominative: znamenitost
• accusative: znamenitost

That is common with many inanimate feminine nouns.

Because sa (with) requires the instrumental case.

So:

• vodič = guide
• sa vodičem = with a guide

And because there is an adjective too, both words go into instrumental singular:

• turistički vodič = a tourist guide
• sa turističkim vodičem = with a tourist guide

That is why both words change.

Here it means a person: a tour guide.

The noun vodič can sometimes mean guide in a broader sense, including a guidebook in some contexts, but with sa turističkim vodičem, the natural meaning is clearly:

• with a tourist guide
• accompanied by a tour guide

Both s and sa mean with, but sa is often used to make pronunciation easier.

Here, sa turističkim vodičem is easier to say than s turističkim vodičem, because otherwise you would get a difficult consonant cluster at the beginning.

So sa is chosen for smoother pronunciation.

Yes, but the meaning changes slightly.

• Kad stignemo, obići ćemo... = When we arrive, we’ll visit...
• Čim stignemo, obići ćemo... = As soon as we arrive, we’ll visit...

So čim emphasizes immediacy: the second action happens right after the first.

Because Serbian verbs already show the subject.

• stignemo = we arrive
• ćemo = we will

So the pronoun mi (we) is not necessary.

You could add mi for emphasis, but normally it is omitted:

• Čim stignemo, obići ćemo... = neutral, natural
• Čim mi stignemo, mi ćemo... = more emphatic, usually unnecessary

Yes. Serbian word order is fairly flexible.

For example, you can also say:

• Obići ćemo znamenitost sa turističkim vodičem čim stignemo.

This means the same thing.

The version with Čim stignemo first puts the time condition up front, which is very natural in both Serbian and English.