Vattenfallet ligger inom parken.

Because vattenfallet is the definite form: the waterfall.

• ett vattenfall = a waterfall
• vattenfallet = the waterfall

Swedish usually puts the definite article at the end of the noun instead of using a separate word like English the.

Also, vattenfall is a neuter noun (ett word), so its definite singular ending is -et:

• ett vattenfall
• vattenfallet

In Swedish, the is often built into the noun as a suffix.

So:

• en park = a park
• parken = the park

There is no separate word before the noun here. That is completely normal in Swedish.

So inom parken literally works like within-the park, but in natural English we say within the park.

They are:

• ett vattenfall = a waterfall
  
  • gender: neuter (ett word)
• en park = a park
  
  • gender: common gender (en word)

That is why their definite forms look different:

• vattenfall → vattenfallet
• park → parken

This is one of the first big noun patterns learners need to get used to in Swedish.

Swedish very often uses ligga (to lie / be located) when talking about where places or physical things are located.

So:

• Vattenfallet ligger inom parken. = The waterfall is located within the park.

Using är would usually sound less natural here. In Swedish, location is often expressed with verbs like:

• ligga = lie / be located
• stå = stand
• sitta = sit

For geographical features, buildings, towns, parks, lakes, and similar things, ligga is extremely common.

Inom means within, inside the limits of, or inside the boundaries of.

In this sentence, inom parken emphasizes that the waterfall is inside the park area.

Compared with i:

• i parken = in the park
• inom parken = within the park / inside the park boundaries

Inom can sound a bit more formal, official, or boundary-focused. In everyday speech, many Swedes would often say i parken instead.

So this sentence is correct, but inom gives a slightly more precise or formal feel.

Yes. Swedish forms compounds very freely, and vattenfall is a compound noun:

• vatten = water
• fall = fall

Together:

• vattenfall = waterfall

Then the definite ending is added to the whole compound:

• vattenfall → vattenfallet

This is very typical Swedish word-building.

Yes, that is possible.

Both of these are grammatical:

• Vattenfallet ligger inom parken.
• Inom parken ligger vattenfallet.

The second version puts more focus on within the park.

This happens because Swedish is a V2 language, which means the finite verb usually comes in the second position in main clauses. So if you move Inom parken to the front, the verb ligger still stays in second position:

• Inom parken
  • ligger
    • vattenfallet

You cannot keep normal English-style order and say:

• Inom parken vattenfallet ligger ❌

A rough guide:

• vattenfallet ≈ VAHT-en-fal-let
• ligger ≈ LIG-er
• inom ≈ ee-NOM
• parken ≈ PAR-ken

A few useful notes:

• The stress in vattenfallet is mainly on the first part: VAT-
• g in ligger is pronounced like a hard g
• r in Swedish is usually lighter than in many English accents
• The a in park is longer and more open than English speakers often expect

If you want to sound natural, focus especially on the rhythm:

• VAT-ten-fal-let LIG-ger ee-NOM PAR-ken

Yes. Both nouns are in the definite form:

• vattenfallet = the waterfall
• parken = the park

So the sentence refers to a particular waterfall and a particular park that are already known from the context.

If you wanted an indefinite version, it would look like:

• Ett vattenfall ligger inom en park. = A waterfall is located within a park.

That sounds much less natural in most real contexts, but grammatically it shows the difference clearly.

Here is the breakdown:

• Vattenfallet = noun phrase / subject
• ligger = verb
• inom = preposition
• parken = noun, object of the preposition

So the structure is:

subject + verb + prepositional phrase

That is a very common Swedish sentence pattern.