Discover the oldest man-made structures across the world that are still open for business today. Whether they're sites of worship, popular tourist attractions, or luxury apartments, there are plenty ...

The sturdy, well-built structure was likely constructed on dry land at a time when sea levels were much lower than they are today ...

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

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 ...