Guess where this is?

[jms]

Is it a windmill ruin? I would have started with somewhere in the UK, but the painted driving direction on the road seems to suggest right-hand driving. Denmark?

[Brian Ellis]

Not a windmill, not UK or DK, right continent.

[Fat Tone]

Spain?

[Brian Ellis]

Not Spain

[Brian Ellis]

I did say it may be trickier! Clue #1 When first built, it had its foot in the water.

[jms]

OK. Then my next guess will be an ancient lighthouse in the Netherlands!

[Brian Ellis]

Neither Netherlands nor a lighthouse. Clue #2: It is not as old as it looks.

[jms]

Then, I don't know!

Bet it's a "modern" public toilet.

[Fat Tone]

Part of a castle defences, originally in a moat?

[Brian Ellis]

Not a toilet (at least intentionally!), not part of a moated castle. Clue #3: It was built about 1825 or thereabouts by the Member of Parliament for Ipswich some 950 km ±100 km (my guess) by road from his constituency.

[jms]

France?

[Brian Ellis]

Not France but Clue #4: in a French-speaking neck of the woods

[Brian Ellis]

Clue #5: I lived within about 10 km of this structure for 35 years!

[Fat Tone]

Clue #5: I lived within about 10 km of this structure for 35 years!

Switzerland! YAY!

[Brian Ellis]

Yes but where in Switzerland? We know that it is in the French-speaking area that eliminates 2/3 of the country, that it must be near water, perhaps on reclaimed land, that it was built by the MP for Ipswich, therefore presumably an Englishman, around 1825 and that I lived within about 10 km of it for 35 years.

I suggest that there must be enough info there to suss it out. If not, I'll give you one more clue.