1) The sitcom "Friends" is known for its iconic Central Perk coffee shop, where the main characters often gather.

2) The world's oldest tree is believed to be a bristlecone pine named "Methuselah" in California, estimated to be over 4,800 years old.

3) The Plitvice Lakes National Park, situated in Croatia, is a stunning natural wonder known for its cascading lakes, waterfalls, and vibrant turquoise-colored waters. It is a UNESCO World Heritage site and attracts visitors who come to explore its picturesque trails and scenery.

4) The Great Wall of China is not visible from space without aid, contrary to popular belief.