Which colony was established nearest Iberia? What is the name for the strait that separates this area?

Colony Tingi that was separated from Iberia by the Strait of Gibraltar.

Explanation:

Iberia is the name of the part known as the Iberian peninsula, today part of Spain.

In ancient times, Tingi or Tingis was the important port on the Atlantic Ocean and the continent of Africa. Tingi has later become Roman Colony nearest the Iberia. The only thing that separated Iberia from Tingi was strait called today the Strait of Gibraltar.

Tingi exists today as the city in Morocco by the name of Tangier.