MapTheOdd / Guides / Unusual places in Guernsey
Curated atlas guide · 2 mapped records
Tidal roads, compact geological boundaries and environmental layers that change how the island can be read and reached.
A high, surprisingly level headland records an ancient marine erosion surface that local geological interpretation describes as a largely submerged warm-water reef around 10 million years ago.
Explore place →A causeway alternates between road and seabed according to the tide.
Explore place →MapTheOdd recommends The reef that became a cliff-top plateau, An island joined by the tide, with maps, evidence sources and related records.
Each place page provides coordinates, evidence, seasonal context and related oddities.