Learn French: C'est le monument le moins impressionnant du pays. - It is the least impressive monument in the country.

In French, when an adjective comes after the noun in a superlative sentence, you must repeat the definite article (le, la, or les). The first le goes with monument (the monument), and the second le goes with moins impressionnant (the least impressive).

The translation says in the country, but the French uses du pays. Why is it du?

After a superlative, French uses the preposition de to set the boundaries of the comparison, even when English says in. Because pays is masculine, de + le pays combines into du pays (literally of the country).

Why does the sentence start with C'est instead of Il est?

We use C'est because it introduces a noun phrase (le monument). If you were describing a specific monument using just an adjective by itself, you would use Il est, as in Il est impressionnant (It is impressive).

How is moins impressionnant pronounced together?

Because moins ends in an s and impressionnant starts with a vowel, you must make a sound link between them (called a liaison). The s is pronounced like a z sound, blending directly into the next word: moin-z-impressionnant.