work in progress

image sources, from top to bottom:

1: https://commons.wikimedia.org/wiki/File:Atterrissement.jpg
By Sergio77 [GFDL (http://www.gnu.org/copyleft/fdl.html) or CC BY-SA 3.0 (https://creativecommons.org/licenses/by-sa/3.0)], from Wikimedia Commons

2: https://commons.wikimedia.org/wiki/File:Bundesarchiv_Bild_102-01035,_New_York,_Verlegen_von_Unterseekabel.jpg
Bundesarchiv, Bild 102-01035 / Unknown / CC-BY-SA 3.0 [CC BY-SA 3.0 de (https://creativecommons.org/licenses/by-sa/3.0/de/deed.en)], via Wikimedia Commons

3: https://commons.wikimedia.org/wiki/File:Machine-cable.jpg
By Sergio77 [GFDL (http://www.gnu.org/copyleft/fdl.html) or CC BY-SA 3.0 (https://creativecommons.org/licenses/by-sa/3.0)], from Wikimedia Commons

4: https://commons.wikimedia.org/wiki/File:Nessie_II.JPG
By Friflash [CC BY-SA 4.0 (https://creativecommons.org/licenses/by-sa/4.0)], from Wikimedia Commons

5: https://commons.wikimedia.org/wiki/File:Steel_wire_rope.JPG
By Steel_wire_rope.png: Johannes Hemmerleinderivative work: Materialscientist (Steel_wire_rope.png) [CC BY-SA 2.5 (https://creativecommons.org/licenses/by-sa/2.5), CC BY-SA 3.0 (https://creativecommons.org/licenses/by-sa/3.0) or GFDL (http://www.gnu.org/copyleft/fdl.html)], via Wikimedia Commons

6: https://commons.wikimedia.org/wiki/File:Blondin_Crossing_the_Niagara.jpg
See page for author [Public domain], via Wikimedia Commons

7: https://commons.wikimedia.org/wiki/File:Rhll_wire_rope.jpg
By Bernard S. Jansen [GFDL (http://www.gnu.org/copyleft/fdl.html), CC-BY-SA-3.0 (http://creativecommons.org/licenses/by-sa/3.0/) or CC BY 2.5 (https://creativecommons.org/licenses/by/2.5)], from Wikimedia Commons

8: https://commons.wikimedia.org/wiki/File:Ammergauer_DanielGipfelA.jpg
User: Bbb at wikivoyage shared [GFDL (http://www.gnu.org/copyleft/fdl.html) or CC BY-SA 3.0 (https://creativecommons.org/licenses/by-sa/3.0)], from Wikimedia Commons

9: https://commons.wikimedia.org/wiki/File:VIEW_FROM_ZUGSPITZE.jpg
By Denise Hastert [CC BY-SA 4.0 (https://creativecommons.org/licenses/by-sa/4.0)], from Wikimedia Commons

10: https://commons.wikimedia.org/wiki/File:Wonderland_Walker_2.jpg
By kevint3141 [CC BY 2.0 (https://creativecommons.org/licenses/by/2.0)], via Wikimedia Commons

11: https://commons.wikimedia.org/wiki/File:Der_sch%C3%B6nste_Zugspitze.jpg
By Nawadee [CC BY-SA 4.0 (https://creativecommons.org/licenses/by-sa/4.0)], from Wikimedia Commons

12: https://commons.wikimedia.org/wiki/File:Atlantic_Ocean_-_panoramio_-_Johannes_Geiger.jpg
Johannes Geiger [CC BY-SA 3.0 (https://creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons

13: https://commons.wikimedia.org/wiki/File:Mt._Foraker,_Mt._Hunter,_Mt._McKinley_mountains_(in_order_fom_left_to_right),_Denali_National_Park,_Alaska_LCCN2010630668.tif
[Public domain], via Wikimedia Commons

14: https://commons.wikimedia.org/wiki/File:Mount_McKinley_in_Alaska%27s_Denali_National_Park_LCCN2010630272.tif
[Public domain], via Wikimedia Commons