landinu

In a sentence

• Við ferðumst um landið til að sjá fallega staði.

  We travel around the country to see beautiful places.

  Here, "landið" is used as a noun in the accusative case, referring to the country the travels are about.

• Eftir jarðskjálftann var mikið tjón á landinu.

  After the earthquake, there was much damage to the country.

  Here, "landinu" is in the dative case, denoting the area affected by the damage.

• Ég er stoltur af menningu landsins.

  I am proud of the culture of the country.

  Here, "landsins" is in the genitive case, indicating possession or association.