These ancient structures still stand - but the people who built them remain a mystery that history can’t fully explain.

Whether they're sites of worship, popular tourist attractions or luxury apartments, there are plenty of historic landmarks still flourishing today. Read on to see the world's oldest man-made ...

Whether they're sites of worship, popular tourist attractions, or luxury apartments, there are plenty of historic landmarks still flourishing today. Read on to see the world's oldest man-made ...

Paris has an abundance of beautiful sites: Notre Dame, the Louvre, the Arc de Triomphe and many more. But the Eiffel Tower stands as the iconic landmark of France’s capital—although it’s only been ...

The Sein Island submerged stone structures include a football-field-long granite wall off Brittany that dates back more than ...