please empty your brain below

What's the lowest you've been this year?

(measure from sea level, if you can)
(if it's the seaside, just say 0m)

Sheppard Street, Plaistow (1m above)
The 'Cave' ...of course
In 2021 ... Bainbridge Vets at +195m
Zero, Douglas Beach at low tide.*
23m - the lowest point on the footpath back to my house (pretty.deal.heats in What3Words)
Digging out my pond in the garden :)
Lowest is the same as highest in 2021 because I haven't left my bungalow and the garden.
I think about 30m below sea level in the cross-harbour tunnel in Hong Kong.
There is a new tunnel from Tuen Mun to the airport which is up to 60m deep but I haven't had any excuse to use it yet.
The underground garage under my flat - probably around 3m above sea level.
About 8m above the Thames in Thurrock.
- 5m - in a polder in the Netherlands (Midden Delfland).
~42m. Alvaston, Derby
28m - Tesco, Barkingside.
65 metres in the Burnley road Tunnel. I can't find out if that is by sea level but I think so.
60m - Blackwater river in Blackwater.
0m on Brighton beach.
3m, half-a-mile away from home (12m).
56m in landlocked Oxford
If we're staying with 2021 then I don't have a clue as I've barely been anywhere! It's probably my local park which appears to be 30m above sea level...
~22m by the Wandle in Mitcham. Most years it would be the Channel Tunnel.
Difficult to be exact, but probably Kakumbi in east Zambia. Roughly 529m above sea level (though I was in a 4x4 so maybe add another metre).
38m - Opticians in Winchester
1m or so. Tate beach, Thames.
Probably about -1 or -2m-- beaches around Mt Edgcumbe in Cornwall at low tide.
Apparently both Deptford Park and Southwark Park have areas of 0m, both of which I crossed.
Probably walking by the tidal Thames near Ham House, maybe 2m.
40 m.
- 15m Greenwich foot tunnel. (I wouldn't recommend it as mask wearing and social distancing were poor)
I don't know the exact number, but guessing 20m below sea level having driven through the Blackwall Tunnel
Overground line between Wapping and Rotherhithe. About 20m below sea level.
37 metres above sea level, Caversham Lock on the Thames.
5 metres in the QE Olympic Park
46m above sea level in Attercliffe, Sheffield. It's the lowest point on one of my regular walks from home.
-9 meters, at Stortinget Tube Station in Oslo.
3m - on the shores of the River Colne in Wivenhoe and the mudflats of Tollesbury
About 2m, in low-lying Cambridgeshire
61m above sea level, above the outflow from Marshall's Lake in Bedgebury Pinetum, Kent.
I have definitely been to about 105m on the Strines Road, on the edge of Greater Manchester.

I may have been about 80m at Marple Bridge (a few miles away) but I can't remember if that was in December or not.
I have needed to travel into town for work so mine is the westbound Piccadilly platform at Holborn tube station (-18m, -41 from ground level), as mentioned.
7m (port of Antwerp)
67m on A45 near Northampton.
It's a bit of a guess - but it would be 5-10m - on Water St in St. John's
About 3-4m in the oddly low bit of Battersea / Lavender Hill where the Heathwall river used to flow (well, still does if you know which deep drains to peer down).
At waterlevel in Cody Dock (pulling out bits of tree) which according to the routecalculator website is at the same height as Sycamore Close near Star Lane station. Quoted as 7m, using a different datum to your phone app presumably.
15m, A46, Newark upon Trent.
Jubilee, Waterloo/Green Park.
6m, near Westfield.
I live in Poole so have been at sea level when I went for a brief walk along the harbour at Baiter Park.
12m - near the River Wandle in Colliers Wood en route to a hospital appointment in St George's Hospital, Tooting. I've just remembered that I took the Northern Line one way so have been below sea level, a few metres or so after all!










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