“CBS Sunday Morning” explores the world of architecture, design and construction in the U.S. and around the world.

In 1948, a nationwide design competition determined what shape the Memorial would take, and in 1963, construction began on architect Eero Saarinen’s design for a stainless steel arch. Completed in 1965, the Gateway Arch stands as a symbol of national iden...

The most mysterious monuments on Earth wow visitors and continue to befuddle seasoned researchers.