The Wall of Separation Between Church and State was a term first used by Thomas Jefferson in a letter to the Danbury (CT) Baptists in 1802: "Believing with you that religion is a matter which lies between a man and his God, that he owes account to none other for his faith and worship, that the legislative powers of government reach actions only, and not opinions, I contemplate with sovereign reverence that of the whole American people which declared that their legislature should 'make no law respecting an establishment of religion or prohibiting the free exercise thereof,' thus building a wall of separation between Church and State."
The Vietnam Veterans Memorial Wall is a national war memorial in Washington, D.C. that honors members of the U.S. armed forces who fought in the Vietnam War and who died in service or are still unaccounted for. It was dedicated in 1982.
Wall Street is a street in lower Manhattan that and was the first permanent home of the New York Stock Exchange; Wall Street is also shorthand for the American financial industry. The name originally referred to the Walloons, French speaking Belgians that helped populate this settlement. It came to refer to a fortified 12-foot high wall of timber and earth that was built by Peter Stuyvesant on behalf of the Dutch East India Company to defend the area against attack from Native American tribes, New England colonists, and the British. The street was laid out along the wall in 1685 and the wall itself was dismantled by the British in 1699.
The Dingo Fence or Dog Fence is 3,306 mile-long pest-exclusion fence that was built in Australia during the 1880s and finished in 1885 to keep dingoes out of the relatively fertile south-east part of the continent (where they had largely been exterminated) and protect the sheep flocks of southern Queensland. It is one of the longest structures on the planet and the world's longest fence.
