The north-south border is located in Nicosia, which separates the Turkish settlement in the northern part of Cyprus and the Greek settlement in the southern part. The dividing line in the middle is called the "green line" and is guarded by UN peacekeeping forces. The checkpoint is guarded by soldiers, and foreign tourists can take pictures of soldiers at the guard post, and enter the northern part from Nansai to view the scenic spots.
I took my EU Schengen passport and entered North Cyprus at the north end of the commercial street in the center of South Nicosia. I just scanned and registered my passport at the kiosks on both sides. There was no charge. It seems that I only saw soldiers guarding in the southern city, but I didn't see the northern city.
The green line guarded by the UN peacekeeping police calls for peace.
The border is not so tense. In fact, both sides are similar. It was originally a country that was divided.