Season 11

1. Rock 'N' Roll Island

2023-05-15 · 44m

Exploring Air Studios, on the Island of Montserrat, that became a mecca for rock legends. Also Tskaltubo, in Georgia, built to host a fearsome dictator.

2. Penthouse Palace

2023-05-22 · 44m

Exploring Haludovo Palace Hotel in Croatia, Wolf's Lair, a German military complex and Herouni Mirror Radio Telescope - a pioneering facility in Armenia.

3. Castle Kingdom

2023-05-29 · 44m

Exploring a theme park in Buenos Aires built in a time of terror and dogged by controversy, and a jaw-dropping collection of castles in Turkey.

4. Fake News Fortress

2023-06-05 · 44m

Exploring Dover Commando Fortress in South East England, where traces of a top-secret Commando raid are still visible.

5. The True Cross

2023-06-12 · 43m

Exploring Old Byron Hot Springs in the Californian desert - a once glittering Hollywood hotspot, converted into a top-secret interrogation centre.

6. Wonderland

2023-06-19 · 44m

A symbol of national pride that became a symbol of excess in the Turkish capital of Ankara.

7. K-Pop Dreamland

2023-06-26 · 44m

Exploring Yongma Land - a South Korean dreamland given a second life from the most unlikely of places.

8. Blues Prison

2023-07-03 · 44m

Exploring Old Joliet Prison, a battered facility near Chicago that descended into open war, but then hosted the Blues Brothers!