The city of Sydney lies in a basin atop an underlying plateau of rock known as Hawkesbury sandstone, which is a rock much prized for its ability to be hewn and for its rich mellow colour.
Picton is a small hamlet about 8o kms south west of Sydney. It is rapidly evolving as a dormitory suburb.
With the coming of the first railway line in 1855 from Sydney to Parramatta, the head of the railways of the colony, John Witten, undertook an extensive expansion. Between 1863 and 1867 a viaduct was built over the Stonequarry River to enable expansion to the SW.
The Picton viaduct carries a double railway track. It has 5 arches, is 30m high and 84m in length. It was built using the same techniques the Romans used to build, say, the Pont du Gard in the south of France.
A member of the Mellow Yellow Monday community.