The thing that President Wilson's Fourteen Points proposed about communication between nations was open discussion and no secret treaties between nations. This was proposed by Wilson to avoid any further war between nations as was the case of World War I. It can be called Open Diplomacy as well.
They lost faith because President Johnson hadn't delivered the victory he had repeatedly promised.
The answer is Machu Picchu.
One of the most important cities of the Inca Empire was Machu Picchu. The reason why it is usually known as the "lost city" is because this city was not discovered by the Spanish when in the 1500s they conquered the Inca territory. Machu picchu is one of the New Seven Wonders of the World nowadays.