Collection place
- Ucayali River, Ucayali Region, Central Peru111
- Uckuyu, Northern Syria1
- Udaipur district, Rajasthan, India203
- Udayliyah, Saudi Arabia73
- Udi, Nigeria29
- Uffizi Gallery, Florence, Tuscany3
- Uganda1,864
- Ugashik River, Bristol Bay, Bristol Bay Borough1
- Ughelli, Nigeria1
- Uinta, Wyoming2
- Uintah County, Utah57
- Ukambani, Kenya189
- Ukiah Rancheria, Ukiah Valley, Mendocino County141
- Ukiah Valley, Mendocino County, California283
- Ukiah, Ukiah Valley, Mendocino County103
- Ukpo, Nigeria4
- Ukraine22
- Ulalamo Mounds, Presidio Valley, Sinaloa1
- Ulia (ancient place), Hispania Ulterior1
- Ulithi Atoll, Yap State, Federated States of Micronesia3