Found another border in the Dutch 1987 edition:

Most defiladet [is that a proper English word?] border:

The "Iron Curtain" (1380 km long) which separates Western Germany from Eastern Germany, is covered with 2,23 milj. landmines en 80.500 km barbed wire and further has many watchtowers with detection equipment.

The last of the 55.000 SM-70 [?] weapons was removed on 30 november 1984.

The complete 246 mtr. wide BorderLand [!] measures 344 km² Eastern German territory and costed for building and maintenance about 20 bilj Dutch Guilders [about 9-10 bilj. USD?].

The result was a decrease in the number of refugees to the waet of more than 200.000 in 1961 to only 30 (among them 8 borderguards) in 1985. Since 1962 there were 184 people got killed. In march 1984 in East-Berlin the building of a second wall was started; the 'anti-fascistic defending barrier'.

So now we have:

number of b. (319)

highest number of b. per continent (Africa=109)

number of coastal b. (appr. 420 - 140 recognized)

highest number of borders compered to size of the countries per continent (Europe)

most frequently crossed b. (Mexico - USA)

country with most b. (China = 14 = Hong Kong and Macau excleded)

country with most coastal b. (Indonesia = 19)

longest coastal b. (Greenland - Canada)

longest unbroken b. (Canada - USA)

longest unbroken land b. (Chile - Argentina)

shortest b. (Gibraltar - Spain)

shortest stretch of broken land b. (Morocco - Spain at El Peñon de Velez de la Gomera)

former best defended b. - West Germany - East Germany)

Missing record:

less frequently crossed b. (Korea's ?)

highest total length of b. (China ?)

gl

Harry ten Veen