Take a virtual tour of the Hermitage museum
The Louvre also offers virtual tours
The Prado many virtual tours
Don't forget to visit the Denver Art Museum!
Richard Wagner's The Ring opera series is based on Norse mythology. The Met: Live in HD which is shown in movie theatres, and Saturday Matinee Broadcasts, which air on the radio, occasionally feature The Ring. Additionally, sometimes Opera Colorado and Central City Opera show the Ring. Additionally, other operas also have mythological themes.
Ballet: Many ballets feature mythological themes. Sleeping Beauty is has many elements associated with Greek myth.
Popular Music: Mythology has factored into popular music. Bob Dylan sometimes references Greek and Roman mythology in his songs. The Mother of Muses is about Mnemosyne, the Greek goddess of memory.

The author died in 1898, so this work is in the public domain in its country of origin and other countries and areas where the copyright term is the author's life plus 100 years or fewer.