From FB...Southern Del......U boats, Indy 1.......Ark of C......from Cairo to the Med, Katanga, African capitan transported Indy and Marion, the Germans were debating to blow Katanga's ship out of the water.......the video has the towers near where i lived in 19971.........built during ww2, to look 4 German U boats..

Home sweet home.....afin's island, NO time to die........James bond......my uncle James, Rehoboth Beach, nazi u boat lookout towers....safin's island looks remarkably like where the air korea plane was shot down, mid 80s.

Below write up and video, spiral stairs, Safin's island, poisons........

The concrete observation towers along Delaware's coast were built during World War II to protect the shoreline from enemy ships and submarines. These towers, constructed between 1939 and 1942, were part of the Fort Miles defense system. While they were designed to last about 20 years, they still stand today. 

Here's more information about these towers:

• Purpose:

  The towers were used to spot enemy vessels and relay information to artillery batteries at Fort Miles. 
• Location:

  Eleven towers were built along the Delaware coast, with some located near Rehoboth Beach and others near the Indian River Inlet. 
• Design:

  The towers are made of concrete, stand between 39 and 75 feet tall, and have 1-foot thick walls

Exploring Delaware's World War II Guard Towers

https://www.youtube.com/watch?v=gGoCvU6nAeE