Causeway
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A causeway is a track, road or railway on the upper point of an embankment across "a low, or wet place, or piece of water". It can be constructed of earth, masonry, wood, or concrete. One of the earliest known wooden causeways is the Sweet Track in the Somerset Levels, England, which dates from the Neolithic age. Timber causeways may also be described as both boardwalks and bridges.
The Hindenburgdamm Rail Causeway across the Wadden Sea to the island of Sylt in Schleswig-Holstein, Germany
Kaichu Doro in Uruma, Okinawa-Honto, the main island of the Ryukyu Islands in Japan.
Satellite photo of the Great Salt Lake from August 2018 showing a major color difference between the northern and southern portions of the lake as a result of a mineral imbalance caused by a railroad causeway.
The Julia Tuttle Causeway, one of the major arteries connecting Miami and Miami Beach in Florida
Sweet Track
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The Sweet Track is an ancient trackway, or causeway, in the Somerset Levels, England, named after its finder, Ray Sweet. It was built in 3807 BC and is the second-oldest timber trackway discovered in the British Isles, dating to the Neolithic. The Sweet Track was predominantly built along the course of an earlier structure, the Post Track.
Sweet Track
Part of the Sweet Track oak causeway, England, c. 3800 BC. Exhibited at the British Museum
A polished jadeitite axe head from the Museum of Toulouse
Diagram showing a cross section of the Sweet Track