I want to test the ability of students to read a passage and answer questions about it. Could you please come up with a good question for the passage "She met director Guy Ritchie, who would become her second husband, in November 1998 and gave birth to their son Rocco John Ritchie on August 11, 2000 in Los Angeles. Rocco and Madonna suffered complications from the birth due to her experiencing placenta praevia. He was christened at Dornoch Cathedral in Dornoch, Scotland, on December 21, 2000. Madonna married Ritchie the following day at nearby Skibo Castle. Her fifth concert tour, titled Drowned World Tour, started in June 2001. The tour visited cities in the U.S. and Europe and was the highest-grossing concert tour of the year by a solo artist, earning $75 million from 47 sold-out shows. She also released her second greatest-hits collection, titled GHV2, to coincide with the home video release of the tour. GHV2 debuted at number seven on the Billboard 200."?
The answer to this question is:
Where did Madonna mostly tour?