April 20, 2017
13
140
EN
Documentary series investigating why some of the world's most advanced architectural achievements were abandoned.
Kasper Michaels
Narrator (voice)
Specials
6 episodes
May 25, 2017
Season 1
6 episodes
April 20, 2017
Philip Grossman
N/A
Season 2
8 episodes
March 20, 2018
Season 3
10 episodes
October 2, 2018
Season 4
9 episodes
April 4, 2019
Season 5
8 episodes
October 3, 2019
Season 6
11 episodes
March 26, 2020
Season 7
11 episodes
December 3, 2020
Season 8
11 episodes
May 20, 2021
Season 9
22 episodes
January 2, 2022
Season 10
16 episodes
June 7, 2023
Season 11
8 episodes
September 4, 2024
Season 12
8 episodes
August 13, 2025
Season 13
12 episodes
February 11, 2026
Travel Channel
US
Science Channel
US
Procter & Gamble Productions
US
Like A Shot Entertainment
GB
