Horizons seem to want to exist at the point where the land and the sea meet the sky.
Here are some ‘ends of the world’ as the Flat Earthers might have believed
From this beach in Oman on the shore of the Indian Ocean the next landmass is Antarctica…that’s a very long way….
Standing on Bredon Hill in Worcestershire, the view to the horizon is across the Vale of Evesham.
From this view at the Gower, South Wales, a ship would disappear from view before shipwrecking in Ireland
Little Eye and Hilbre Island seem to sit on the horizon from the view at West Kirby on the Wirral Peninsular west to Ireland and St Georges Channel
(click images to enlarge)