15 MOST Advanced Artificial Islands
28:04
15 MOST Expensive Traffic Intersections Ever Built
29:12
15 Amazing Floating Roads and Bridges
31:02
INFRASTRUCTURE Built in Mysterious Locations
28:20
15 Sea Walls Designed to Protect Against BIG WAVES
30:03
The TALLEST Abandoned Buildings in the World
34:30
15 Towns Built Entirely for Research Purposes
31:25
15 MOST Elaborate Castles
27:54