travel widely
travel extensively

John continues to travel extensively and has now been to some 65 countries.

As part of his research, the author traveled extensively throughout China.

They are a must for anyone who travels extensively, like I do.

From that year until 1840, he traveled extensively in Europe and the east.

In 1840-1842 he traveled extensively with his family throughout western Europe.

During her 40 years as a published author, she traveled extensively.

He is known to have traveled extensively as an official, particularly between the years 723-744.

He was a man of independent means who traveled extensively.

He did not travel extensively, and spent his entire life in southern England.

The nature of his job took him around the world and he has traveled extensively in India.