Το συντριβάνι είναι κοντά στο μεγάλο σταυροδρόμι στο κέντρο.

στο is the contraction of σε + το.

• σε is a very common preposition that can mean in, at, to, or on, depending on context.
• το means the for a neuter singular noun.

So in this sentence:

• κοντά στο μεγάλο σταυροδρόμι = near the big intersection
• στο κέντρο = in the center

It appears twice because there are two separate phrases using σε:

1. one with σταυροδρόμι
2. one with κέντρο

Because after σε, Modern Greek normally uses the accusative case.

Here:

• σταυροδρόμι is a neuter singular noun
• κέντρο is also a neuter singular noun
• μεγάλο is the adjective and has to agree with σταυροδρόμι

So:

• στο μεγάλο σταυροδρόμι
• στο κέντρο

A useful thing to know: for many neuter nouns in Greek, the nominative and accusative forms are the same, so you do not see a visible change in the noun itself.

It behaves a bit like both, but for learners it is easiest to think of κοντά as meaning near or nearby.

Very often it is followed by σε:

• κοντά σε ένα σπίτι = near a house
• κοντά στο σχολείο = near the school

So in your sentence, κοντά στο μεγάλο σταυροδρόμι is the normal way to say near the big intersection.

You can also use κοντά on its own:

• Το σπίτι είναι κοντά. = The house is nearby.

Greek uses the definite article very often, and here Το συντριβάνι means the fountain.

It shows that we are talking about a specific fountain, not just any fountain.

Compare:

• Το συντριβάνι είναι κοντά... = The fountain is near...
• Ένα συντριβάνι είναι κοντά... = A fountain is near...

The second version is possible, but it would usually need a special context.

It can mean either one, depending on context.

• In a city context, στο κέντρο often means in the city center / downtown
• In a more general spatial context, it can mean in the center / in the middle

So if this sentence is about giving directions in a town, many learners would naturally understand στο κέντρο as in the center of town.

Literally, σταυροδρόμι means crossroads. In everyday use, it can also mean a road intersection.

So in this sentence, μεγάλο σταυροδρόμι is something like:

• big crossroads
• major intersection
• large junction

Another common Greek word is διασταύρωση, which also means intersection.
Very roughly:

• σταυροδρόμι can sound a bit more like crossroads
• διασταύρωση can sound a bit more neutral or technical

As written, στο κέντρο most naturally attaches to the nearest phrase, so many readers will understand it as describing the big intersection:

• the big intersection in the center

That gives the overall meaning:

• The fountain is near the big intersection in the center.

But in real life, context matters, and some people could also understand it more broadly as the location of the whole scene.

If you want to make it clearer, you could rephrase:

• Το συντριβάνι είναι στο κέντρο, κοντά στο μεγάλο σταυροδρόμι.
  = The fountain is in the center, near the big intersection.

• Το συντριβάνι είναι κοντά στο μεγάλο σταυροδρόμι που είναι στο κέντρο.
  = The fountain is near the big intersection that is in the center.

Yes. Greek word order is more flexible than English word order.

The sentence:

• Το συντριβάνι είναι κοντά στο μεγάλο σταυροδρόμι στο κέντρο.

is natural and correct.

But you could also say:

• Στο κέντρο, το συντριβάνι είναι κοντά στο μεγάλο σταυροδρόμι.
• Το συντριβάνι είναι στο κέντρο, κοντά στο μεγάλο σταυροδρόμι.

These versions shift the emphasis a little, but the basic meaning stays similar.

Greek often changes word order for:

• emphasis
• topic
• style
• clarity

Yes, absolutely.

• Το συντριβάνι είναι κοντά... = The fountain is near...
• Το συντριβάνι βρίσκεται κοντά... = The fountain is located near...

Both are correct.

The difference is mostly stylistic:

• είναι is simpler and very common
• βρίσκεται sounds a bit more formal, descriptive, or written

So if you are giving directions casually, είναι is perfectly natural.

The stress is on these syllables:

• συντριβάνι → syn-tri-VA-ni
• είναι → E-ne
• κοντά → ko-DA
• μεγάλο → me-GA-lo
• σταυροδρόμι → stav-ro-DRO-mi
• κέντρο → KEN-dro

A few pronunciation notes:

• δ sounds like the th in this
• γ before α, ο, ου is a soft voiced sound, not like English hard g
• Greek stress matters, so learners should pay attention to the accent marks

That is especially helpful with words like μεγάλο and σταυροδρόμι, where the stress is not where an English speaker might first guess.