This is the 9698th most frequent Russian word.
чукотка
Chukotka: A region in the Russian Far East, officially known as Chukotka Autonomous Okrug.
Here, 'Чукотка' refers to the geographical region in Russia, used as the destination in the sentence.
Давным-давно ездили мы в Чукотку.
Long ago, we traveled to Chukotka.
In this usage, 'Чукотка' represents the geographical area while discussing its characteristics.
Чукотка известна своим суровым климатом.
Chukotka is known for its harsh climate.
Here, 'Чукотки' is in the genitive case to indicate possession or association, referring to the culture belonging to Chukotka.