Visitamos el salón del cómic.

Yes. Visitamos can be either:

• present tense: we visit
• preterite: we visited

That is normal for -ar verbs in Spanish: the nosotros form looks the same in those two tenses.

So by itself, visitamos is ambiguous. Usually the context tells you which one is meant. In a sentence like this, it often means we visited, but we visit is also grammatically possible.

Compare:

• Hoy visitamos el salón del cómic. = Today we visit / are visiting the comic convention.
• Ayer visitamos el salón del cómic. = Yesterday we visited the comic convention.

Because Spanish often drops subject pronouns when they are not needed.

The verb form visitamos already tells you the subject is nosotros/nosotras (we), so Spanish usually leaves the pronoun out unless it is needed for emphasis, contrast, or clarity.

So:

• Visitamos el salón del cómic. = normal, natural
• Nosotros visitamos el salón del cómic. = more emphatic, like we visited...

It breaks down like this:

• Visitamos = verb
• el salón del cómic = direct object

Inside the object:

• el salón = the salon / hall / fair / convention
• del cómic = of the comic / comic-related

So the structure is:

[verb] + [thing visited]

Spanish does not need a preposition after visitar when the object is a place or person:

• Visitamos Madrid.
• Visitamos a nuestros amigos. (with a because they are people)

Here, el salón del cómic is a place/event, so there is no personal a.

Not here.

Salón can mean different things depending on context. Common meanings include:

• living room / lounge
• large hall
• show / exhibition / fair / convention

In el salón del cómic, it usually means something like:

• comic fair
• comic convention
• comic expo

In Spain, salón is often used for big themed events, trade fairs, or conventions.

Because de + el contracts to del.

So:

• de + el = del

That is mandatory in normal Spanish.

Examples:

• el título del libro = the title of the book
• la puerta del coche = the door of the car
• el salón del cómic = the comic convention / the comic fair

One important exception: if El is part of a proper name, you do not contract it.

For example:

• de El Escorial (not del Escorial if you are treating El Escorial as the full name)

Because each noun phrase needs its own article.

• el salón = the convention/fair
• del cómic = literally of the comic

So del already includes el.

Spanish often uses articles where English may use a more compact noun phrase. English might say:

• the comic convention

But Spanish commonly expresses that as:

• el salón del cómic
• literally, the convention of the comic

This sounds natural in Spanish.

The accent mark shows the correct stress: CÓ-mic.

Without the accent, Spanish spelling rules would suggest a different stress pattern. The written accent makes sure the word is pronounced correctly.

Also, cómic is a word borrowed from English, but it has been adapted to Spanish spelling and pronunciation.

Here it is singular: el cómic.

In this phrase, Spanish often uses the singular to refer to the medium or category in general, like comics as an art form or theme.

So salón del cómic means something like:

• comic convention
• convention about comics

The plural also exists:

• los cómics = the comics / comic books

But in event names, the singular is very common.

A simple Spain-Spanish pronunciation guide is:

bee-see-TA-mos el sa-LON del KO-mik

More approximately in IPA:

/bi.siˈta.mos el saˈlon del ˈko.mik/

A few points:

• v in Spanish sounds more like a soft b
• salón is stressed on the last syllable: sa-LÓN
• cómic is stressed on the first syllable: CÓ-mic
• the c in cómic is a hard k sound

Yes, you could, depending on context.

Possible alternatives include:

• la convención de cómics
• el salón del cómic
• la feria del cómic

They are similar, but not always identical in tone:

• salón often sounds like an organized fair/expo/convention, and it is very common in Spain for named events
• convención is also correct, but may feel a bit more general or more directly like convention
• feria suggests a fair or trade fair

So el salón del cómic is a very natural Spain-Spanish way to refer to this kind of event.

Yes. Visitar can be used for:

• people
• places
• buildings
• museums
• exhibitions
• fairs
• events of this kind

So visitar un salón, visitar una exposición, or visitar una feria is perfectly normal Spanish.

Examples:

• Visitamos el museo.
• Visitamos la exposición.
• Visitamos la feria del libro.

So Visitamos el salón del cómic sounds natural.