hotel bangeseo badaga boyeoyo.

Here, 에서 marks the place where the seeing happens / the vantage point. So 호텔 방에서 means in/from the hotel room.

In this sentence, the idea is not that the sea is located in the hotel room. It means:

• From the hotel room, the sea is visible
• In the hotel room, you can see the sea

So 에서 is natural because it marks the place from which the perception occurs.

Because the verb is not plain 보다 (to see, to look at), but 보이다 (to be visible / to be seen).

With 보다, you usually mark what is seen with 를:

• 바다를 봐요 = I see / look at the sea

With 보이다, the thing that appears in view is commonly marked with 이/가:

• 바다가 보여요 = The sea is visible / I can see the sea

So 바다가 is correct because the sea is the thing that is appearing to the eyes.

This is a very common question.

• 봐요 comes from 보다 = to see / to look at
• 보여요 comes from 보이다 = to be visible / to be seen

So:

• 바다를 봐요 = I look at the sea / I see the sea
• 바다가 보여요 = The sea is visible / I can see the sea

The second one focuses less on the active action of looking and more on what comes into view.

In English, both can sometimes be translated as I can see the sea, but the Korean grammar is different.

Not in this sentence.

Although 보이다 can sometimes mean to be shown depending on context, in everyday sentences like this it usually means to be visible or to come into sight.

So:

• 바다가 보여요 = The sea is visible / You can see the sea

It does not mean that someone is actively displaying the sea.

Korean often leaves out subjects when they are obvious from context.

In English, you might say:

• I can see the sea from the hotel room
• We can see the sea from the hotel room

In Korean, you often do not need to say 저는 or 우리는 unless you want emphasis or contrast. The sentence simply presents the situation:

• 호텔 방에서 바다가 보여요 = From the hotel room, the sea is visible

The person experiencing it is understood from context.

Yes, 호텔 방 naturally means hotel room.

Korean often puts nouns together directly, without 의, when one noun describes the other:

• 호텔 방 = hotel room
• 학교 생활 = school life
• 한국 음식 = Korean food

You could theoretically make some noun relationships more explicit with 의, but in cases like this, it is usually unnecessary and sounds less natural.

So 호텔 방에서 is the normal way to say in/from the hotel room.

The sentence is:

• 호텔 방에서 = from/in the hotel room
• 바다가 = the sea
• 보여요 = is visible / can be seen

So the structure is roughly:

[place] + [thing that is visible] + [verb]

Korean usually puts the verb at the end. A very literal breakdown would be:

• From the hotel room, the sea is visible

That is why the sentence order may feel different from English.

Yes. Adding 는 gives extra topical or contrastive nuance.

• 호텔 방에서 바다가 보여요 = neutral statement
• 호텔 방에서는 바다가 보여요 = As for in the hotel room, you can see the sea / At least from the hotel room, the sea is visible

This can imply contrast, such as:

• 호텔 방에서는 바다가 보여요. 그런데 로비에서는 안 보여요.
• From the hotel room, you can see the sea. But from the lobby, you can’t.

So the version without 는 is the more plain, neutral sentence.

Yes, and that is often the most natural way to understand it.

• 호텔 방에서 바다가 보여요

Depending on context, this can feel like:

• You can see the sea from the hotel room
• In the hotel room, the sea is visible

English often prefers from because the room is the viewing point. Korean 에서 covers this kind of usage naturally.

보여요 is the polite informal present tense form, which is very common in everyday conversation.

The dictionary form is:

• 보이다

Its polite present form is:

• 보여요

This style is appropriate in many normal situations: speaking politely to someone you do not know well, in service situations, or in general conversation.

A plainer form would be:

• 바다가 보여 = casual
• 바다가 보입니다 = more formal polite

Not exactly in a fixed vocabulary sense, but the overall idea is similar.

Literally, 바다 means sea. So the sentence says the sea itself is visible.

In natural English, depending on context, someone might translate it more freely as:

• The hotel room has an ocean view
• You can see the sea from the hotel room

But the Korean sentence itself is simply describing that the sea can be seen from there.

It is mainly describing visibility, but in English that often becomes can see.

So:

• 바다가 보여요

can be understood as:

• The sea is visible
• I can see the sea
• You can see the sea

Korean is not necessarily emphasizing personal ability in the same way English can sometimes does. It is more about what is visible in the situation.