En el noreste de la península hay ciudades muy bonitas cerca del mar.

En el noreste means in the northeast.

Spanish uses en for location in many cases where English uses in. So:

• en el norte = in the north
• en el sur = in the south
• en el noreste = in the northeast

Here, el is the masculine singular definite article, because noreste is treated as a masculine noun.

In Spanish, compass directions like noreste, noroeste, sureste, and suroeste are normally written as single words.

Examples:

• noreste = northeast
• noroeste = northwest
• sureste = southeast
• suroeste = southwest

So el noreste is the standard form, not norte este.

De means of here, so el noreste de la península means the northeast of the peninsula.

Spanish often uses de to link one noun to another in this way:

• el centro de la ciudad = the centre of the city
• el norte de España = the north of Spain
• el noreste de la península = the northeast of the peninsula

La península is feminine, so it takes la.

Spanish uses the definite article more often than English.

Here, la península refers to a specific peninsula, probably the Iberian Peninsula from context, so Spanish naturally includes the article.

This is very common:

• la ciudad = the city
• el mar = the sea
• la península = the peninsula

Even when English might sometimes leave the article out in certain expressions, Spanish often keeps it.

Hay means there is or there are.

It comes from the verb haber, but in this use it does not mean to have. It is used to say that something exists or is present.

Examples:

• Hay una ciudad = There is a city
• Hay ciudades = There are cities

So in your sentence, hay ciudades muy bonitas means there are very beautiful cities.

No. Hay stays the same for both singular and plural.

• Hay una playa = There is a beach
• Hay playas = There are beaches

This is a very common point for learners, because English changes there is / there are, but Spanish uses hay for both.

After hay, Spanish often uses a noun without a definite article when introducing things that exist.

So:

• Hay ciudades muy bonitas = There are very beautiful cities
• Hay un problema = There is a problem

If you said hay las ciudades, that would sound wrong in normal Spanish.

Using las ciudades would usually mean you are talking about specific cities already known in the conversation, and hay is generally not used that way.

Because muy is the word used before adjectives and adverbs to mean very.

• muy bonito = very beautiful
• muy cerca = very near

Mucho is usually used with nouns, or as an adverb meaning a lot / much in other structures:

• mucho tiempo = a lot of time
• trabaja mucho = he/she works a lot

So before bonitas, which is an adjective, you need muy.

Because adjectives in Spanish usually agree with the noun they describe in gender and number.

Here:

• ciudad is feminine
• ciudades is plural

So the adjective must also be feminine plural:

• bonita = feminine singular
• bonitas = feminine plural

That is why we get ciudades muy bonitas.

In Spanish, adjectives often come after the noun.

So:

• una casa bonita = a beautiful house
• ciudades bonitas = beautiful cities

This is one of the most common word-order differences from English.

Sometimes adjectives can go before the noun, but the normal, neutral position for descriptive adjectives like bonito is after it.

Cerca de means near.

So:

• cerca del mar = near the sea

Del is the contraction of de + el:

• de + el = del

Since mar is masculine here (el mar), de el mar becomes del mar.

This contraction is required in standard Spanish.

Because cerca normally needs de before the thing that is near.

• cerca del mar = near the sea
• cerca de Madrid = near Madrid
• cerca de la playa = near the beach

You can say just cerca if the reference is already clear:

• Está cerca = It is nearby

But when you say what it is near to, use cerca de.

Not in the same way.

Hay is used to say that something exists or there are some of them.

• Hay ciudades muy bonitas cerca del mar = There are very beautiful cities near the sea

Están is used more to say where specific things are located:

• Las ciudades están cerca del mar = The cities are near the sea

So:

• hay introduces the existence of cities in that area
• están would describe the location of specific cities already being talked about

The usual form is el mar, so mar is normally treated as masculine.

That is why the sentence has del mar = de + el mar.

You may sometimes see la mar in poetic, literary, or some regional usage, but for everyday standard Spanish, especially for learners, el mar is the normal choice.

A useful way to see it is:

• En el noreste de la península = location
• hay = there is / there are
• ciudades muy bonitas = the things that exist
• cerca del mar = extra information about where those cities are

So the sentence is built like this:

location + hay + noun phrase + location phrase

This is a very common and useful Spanish pattern:

• En esta zona hay pueblos pequeños.
• En la costa hay playas preciosas.