Highway 101 is a major north-south highway that runs along the Pacific coast of the United States. It stretches from Los Angeles, California all the way up to Olympia, Washington, passing through many beautiful cities and natural wonders along the way.

Here are some highlights of a road trip down Highway 101:

1. Redwood National and State Parks: As you enter California, you'll have the opportunity to visit Redwood National and State Parks, where you can see some of the tallest trees in the world and hike through beautiful forests.

2. San Francisco: Continuing south, you'll come to San Francisco, one of the most iconic cities in the United States. The city is known for its hilly streets, cable cars, and iconic landmarks like the Golden Gate Bridge and Alcatraz Island.

3. Big Sur: As you continue south, you'll enter the breathtaking Big Sur region, where the highway winds along the rugged coastline, offering stunning views of the Pacific Ocean.

4. Los Angeles: As you near the end of your journey, you'll come to Los Angeles, a vibrant, cosmopolitan city known for its world-class entertainment, beautiful beaches, and diverse neighborhoods.

5. San Diego: Your journey ends in San Diego, a city known for its beautiful beaches, great weather, and vibrant cultural scene.

All that’s left when you get to San Diego is to turn around and do it all over again!