Tilbury Fort sits right on the Thames Estuary πŸžοΈβ›΄οΈ, and its history runs deep β€” the fortress defended London from seaborne invaders from the 16th century all the way through to World War II.β˜„οΈ

The first fort here was built by Henry VIII, and later Queen Elizabeth I rallied her army nearby to face down a looming threat.πŸ‡ Standing on the walls and looking out over the river, it's easy to picture everyone here once keeping a watchful eye on the horizon.