Anupam Nath, Associated Press
Tourists riding on elephants take pictures of a one horned rhinoceros at the Kaziranga national park at Kaziranga, northeastern Assam state, India, Sunday, Nov. 1, 2015. The park was reopened Sunday for tourists after its routine closure during the monsoon season. Assam is home to the world's largest concentration of rhinos.

In this photo by Anupam Nath, tourists riding on elephants take pictures of a one-horned rhinoceros at the Kaziranga National Park in northeastern India. The park has reopened to tourists after the monsoon season, which often causes flooding in the region. India's Assam state is home to the world's largest concentration of rhinos, about 2,300 of the endangered animals that number just 3,000 worldwide.