Shenzhen Development Centre, Shenzhen City, Special Economic Zone on the border with Hong Kong, China

Border guards at the conference room, DMZ (Demilitarized Zone) on the border of North and South Korea, South Korea, Asia

Border watch tower, DMZ (Demilitarized Zone) on the border of North and South Korea, South Korea, Asia

Border posts and Gijeong-dong (Propaganda) village with huge DPRK flag, Demilitarised Zone (DMZ), North and South Korea border, Asia

Tourists look at North Korea from the Dora Observatory, Demilitarised Zone (DMZ), North and South Korea border, Asia

DMZ (Demilitarized Zone) on the border of North and South Korea, South Korea, Asia

Dorasan train station to North Korea, DMZ (Demilitarized Zone) on the border of North and South Korea, South Korea, Asia

Street scene of pedestrian walkway in the centre of Shenzhen City in the Special Economic Zone boomtown on border with Hong Kong, China, Asia

Trinkets on sale in Shenzhen City, the Special Economic Zone on border with Hong Kong, China, Asia

Close-up of tower blocks in the centre of Shenzhen City in the Special Economic Zone boomtown on border with Hong Kong, China, Asia

Aerial view above the Brocken mountain in Harz National Park with radio transmitter, Saxony-Anhalt, Germany

Aerial photo, AVANTIS European Science and Business Park, the first cross-border German-Dutch business park, EU region Maas-Rhine, Heerlen, Holland, Aachen, North Rhine-Westphalia, Germany, Europe