Beacon Hill Battery

Harwich Redoubt is a circular fort built in 1808 to defend the port of

Built just outside Felixstowe, Suffolk at the mouth of the River

Freston Tower is a six-story red brick folly south of Ipswich, Suffolk

The Tattingstone Wonder is a folly at Tattingstone in Suffolk,

HM Fort Roughs was one of several World War II installations that were

Sealand (eng: Principality of Sealand) je mikronacija (tj.

Portman Road is an association football stadium in Ipswich, Suffolk,

Shotley Battery was built in 1865 on the Shotley Peninsula to guard

Kalemegdan

Varberg Fortress was built in 1287-1300 by count Jacob Nielsen as

Fredriksten is a fortress in the city of Halden in Norway.

Dover Castle is situated at Dover, Kent and has been described as the

Hammershus is Northern Europe's largest medieval fortification,