Fact – 15 The Panama Railway is the oldest and most expensive in the world. It was built over five years from 1850 to 1855 and cost $8 million to complete. Page 15 of 25Next Page → Pages: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25