Odd boundaries: mapped and explained.

Explore quality-approved odd boundaries records with coordinates, evidence and related unusual places. These are crawlable research records, not an indiscriminate directory: reports without enough depth remain available for exploration but are excluded from search indexing.

Odd boundaries · States of Guernsey

An island joined by the tide

Lihou, Guernsey

A causeway alternates between road and seabed according to the tide.

Map, evidence and context →Odd boundaries · US Census Bureau

A village with one resident

Monowi, Nebraska

A legally incorporated village persists despite an extraordinary population count.

Map, evidence and context →Odd boundaries · US Census Bureau

The American town reached through Canada

Point Roberts, Washington

A border drawn along the 49th parallel left a US community attached by land only to Canada.

Map, evidence and context →Odd boundaries · US National Park Service

The library on an international border

Derby Line, Vermont

A public building is crossed by the boundary between the United States and Canada.

Map, evidence and context →