It's impossible to list all the names of valleys in the world! There are literally millions. However, here are some categories of valley names, and examples within those categories:

By Location:

* Geographic: Valley of the Kings (Egypt), Death Valley (USA), San Fernando Valley (USA), Yosemite Valley (USA), Napa Valley (USA)

* Mountain Ranges: Valley of the Tetons (USA), Valley of the Five Lakes (Canada)

* River Names: Rhine Valley (Germany/France/Switzerland), Mississippi Valley (USA), Nile Valley (Egypt/Sudan)

By Features:

* Geology: Glacial Valley, Rift Valley, Canyon (Grand Canyon, USA), Tectonic Valley

* Flora: Valley of the Flowers (India), Redwood Valley (USA)

* Fauna: Valley of the Wolves (Romania)

* Climate: Dry Valley (Antarctica), Green Valley (Ireland)

By Historical Significance:

* Mythology: Valley of the Moon (California, USA), Valley of the Giants (Oregon, USA)

* Historical Events: Valley of the Fallen (Spain), Valley of the Shadow of Death (Israel)

By Culture:

* Cultural Practices: Valley of the Temples (Italy), Valley of the Kings (Egypt)

* Artistic/Literary Inspiration: Valley of the Sun (Arizona, USA), Valley of the Dolls (USA)

Other:

* Names of Towns/Cities: Silicon Valley (USA), Death Valley (USA)

* By Size: Grand Valley, Little Valley

* By Shape: Horseshoe Valley, Crescent Valley

Remember, many valleys also have both English and local names. It's fascinating to explore the stories behind each valley's name, which often reflect the history, culture, and natural features of the region.