That's close to the latitude of the Antarctic Circle.
It is the parallel of latitude that runs 66° 33′ 44″ (or 66.5622°) north of the Equator.
You're talking about the 'Arctic Circle'.
The island possession located at approximately 18 degrees N latitude and 66 degrees W longitude is Puerto Rico.
Finland
The imaginary line located at 66.5 degrees south latitude is called the Antarctic Circle. This is the southernmost latitude at which the sun can remain continuously above or below the horizon for 24 hours during the summer and winter solstices, respectively. It marks the boundary of the Antarctic region.
That would be the 66.5° S parallel.
The Antarctic Circle is at 66 degrees 32 minutes S latitude. The Arctic Circle is at 66 degrees 32 minutes N latitude.
It is the parallel of latitude that runs 66° 33′ 44″ (or 66.5622°) north of the Equator.
The South Pole is at 90 degrees S latitude. The North Pole is at 90 degrees N latitude. All lines of longitude converge at both poles. The Antarctic Circle is at 66 degrees 32 minutes S latitude.
You're talking about the 'Arctic Circle'.
There's no line there, but if a cartographer chose to draw one on his map or globe, then it would be the 'parallel' of 66° south latitude.
The Antarctic Circle is a line of latitude -- which moves, according to the Earth's wobble. As of 10 March 2016, it runs 66°33′46.1″ as a line of latitude and crosses all degrees of E and W longitude on Earth.
They are both at 66 degrees 32 minutes, either South Latitude or North Latitude.
The Arctic Circle is a line of latitude. As of 2012, it is approximately 66° 33' 44" N latitude.
The Arctic Circle is at 66 degrees 33 minutes N latitude.
The island possession located at approximately 18 degrees N latitude and 66 degrees W longitude is Puerto Rico.
The Antarctic Circle is about 66 degrees S.