Think about it. What happens to all the rain that waters Seattle in the fall and winter? It lays in wait until spring and then transforms all the plant life into a visual spectacle of blooming flowers and mesmerizing greenery.

What Las Vegas lacks in plant life, it makes up for with stunning nightlife. I enjoy visiting every April or May before the desert heat and crowds get too intense.

Finally, San Francisco is the only California city that visitors don't need a rental car to experience! It has the B.A.R.T., trolleys and cable cars, which can be fun, alternative ways to see the sights.