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Riddle of Sardinia Tower
What on Earth? - S11 - E5
Satellite images capture a triangular castle-like tower located on the Mediterranean island of Sardinia; experts investigate the relics of a declining ancient civilization that may have suffered a celestial catastrophe.
What on Earth?: Season 11 - 10 Episode s
11x1 - Secret Soviet Spacecraft
June 22, 2022
Satellites capture a bizarre industrial complex in desert of Kazakhstan.
11x2 - Range of Nazi Evil
June 29, 2022
Satellites capture dozens of parallel lines hidden in Polish woodlands.
11x3 - Doomsday Lair of Greece
July 6, 2022
Satellites capture bizarre structures on the Greek island of Kefalonia.
11x4 - Mystery of the Welsh Mine
July 13, 2022
Satellites capture ruins amid bizarre structures on a Welsh mountaintop.
11x5 - Riddle of Sardinia Tower
July 20, 2022
Satellite images capture a triangular castle-like tower located on the Mediterranean island of Sardinia; experts investigate the relics of a declining ancient civilization that may have suffered a celestial catastrophe.
11x6 - Circles of the High Kings
July 27, 2022
Satellite images capture two conjoined circular structures embedded in the lush and rolling landscape of Ireland; experts investigate and uncover an ancient site linked to legendary figures and the elusive hunt for the Ark of the Covenant.
11x7 - Russia's Lightning Lab
August 3, 2022
Drone images capture oddly shaped towers in a forest clearing near Moscow.
11x8 - Poland's Secret Nazi Compound
August 10, 2022
Satellites capture a series of zigzagging patterns in Polish woodlands.
11x9 - Holes of Dead Sea Destruction
August 17, 2022
Drone images capture enormous holes scattered along the Dead Sea coastline.
11x10 - Ancient Rome's El Dorado
August 24, 2022
Satellites capture bizarre markings etched deep in the mountains of Spain.
What on Earth?: All seasons
S0: Specials
7 Episode s
S1: Season 1
6 Episode s
S2: Season 2
6 Episode s
S3: Season 3
20 Episode s
S4: Season 4
20 Episode s
S5: Season 5
10 Episode s
S6: Season 6
9 Episode s
S7: Season 7
11 Episode s
S8: Season 8
9 Episode s
S9: Season 9
10 Episode s
S10: Season 10
10 Episode s
S11: Season 11
10 Episode s
S12: Season 12
10 Episode s