The Earth's natural treasures, form coral reefs to snow-topped mountains, are spectacular sights and some of the world's most famous places. But people have built some amazing additions to landscape.

All over the world there are incredible buildings and structures; ancient cities that remind us of past glories; places of worship and other sacred sites; beautiful palaces and forbidding castles; towers, dams, and bridges that make the mordern world work. Each of these places is a great human achievement.

• National Parks
• Water-Falls