The Union Bank of California Tower is an 82 m (269 ft), 15 story office building in Portland, Oregon

Portland, Oregon

Portland is a city located in the Pacific Northwest, near the confluence of the Willamette and Columbia rivers in the U.S. state of Oregon. As of the 2010 Census, it had a population of 583,776, making it the 29th most populous city in the United States...

 completed in 1969, and designed by the firm of Anshen and Allen of San Francisco. It is an International-style building, with a strong presence on Broadway. The most prominent feature of the Union Bank of California are its exposed service cores, clad in light gray slate with a greenish tint. It is said that the slate was quarried from the same area in Wales

Wales

Wales is a country that is part of the United Kingdom and the island of Great Britain, bordered by England to its east and the Atlantic Ocean and Irish Sea to its west. It has a population of three million, and a total area of 20,779 km²...

 as the stone used in Stonehenge

Stonehenge

Stonehenge is a prehistoric monument located in the English county of Wiltshire, about west of Amesbury and north of Salisbury. One of the most famous sites in the world, Stonehenge is composed of a circular setting of large standing stones set within earthworks...

.