1) The ozone layer, located in the Earth's stratosphere, protects us from harmful ultraviolet (UV) radiation.

2) The Iguazu Falls, located on the border between Argentina and Brazil, is a majestic waterfall system consisting of numerous cascades and islets. It is a UNESCO World Heritage site and one of the most impressive natural wonders in the world, attracting millions of visitors each year.

3) The Scottish Highlands, located in the northern part of Scotland, are characterized by rugged landscapes, mountains, and lochs (lakes). They are known for their natural beauty, rich history, and cultural heritage, attracting outdoor enthusiasts and those seeking tranquility in nature.

4) The highest-grossing concert tour of all time is U2's "360° Tour," which earned over $735 million in ticket sales.