Save. Jupiterimages/Photos.com/Getty Images. It's easy to mistake lichens as the cause of tree or branch death because they tend to grow on sick trees. In fact, the reason they turn up is because a sick tree has a thin canopy and lets in the sun that makes lichens grow.ave. Jupiterimages/Photos.com/Getty Images. It's easy to mistake lichens as the cause of tree or branch death because they tend to grow on sick trees. In fact, the reason they turn up is because a sick tree has a thin canopy and lets in the sun that makes lichens grow.
4 Hoover Dam. Hoover Dam is one of the world's great engineering marvels. This massive structure, completed in 1935, crosses the Colorado River, linking Arizona and Nevada. It is 726 feet high and 1,244 feet long. Lake Mead, held back by the Hoover Dam, is the largest artificial lake in the United States. It is 110 miles long, and holds the equivalent of two years of flow of the Colorado River.
The Hoover Dam is an esteemed dam that should be respected for its part in American history. The Hoover Dam is located in the north-western part of Arizona and can be reached with a little bit of a drive. From Phoenix, it would take around 4 hours of driving to get to the Hoover Dam. However, for towns located either on the north-western areas of Arizona can get to the Hoover Dam in a range of 2 hours or less. Either way, making the effort while youâre in Arizona to go and take part in Hoover Dam tours will be very educational and memorable.