Does the Tower of London Have a Moat?

No. The Tower of London never had a traditional water-filled moat encircling the entire complex.

Its defenses relied on:

• The River Thames forming a natural barrier on the north side.
• Massive curtain walls with towers (13 inner, 6 outer) on the other three sides.
• A dry ditch (fosse) outside the outer wall—originally ~180 ft wide, later partially filled and built over.

The "moat" visitors see today is the dry ditch, landscaped in the 19th century and famously planted with 888,246 ceramic poppies in 2014 for the WWI centenary. It’s a powerful visual—but it was never a wet moat.