2 Best Sights in The Black Forest, Germany

Built as an exhibition hall for the private collection of businessman Frieder Burda, this modern structure was created by acclaimed New York architect Richard Meier. Continually rotating, the private collection focuses on classic modern and contemporary art. Highlights include a number of pieces by Gerhard Richter as well as works by Picasso, German expressionists, the New York School, and American abstract expressionists.

In a former munitions factory, the vast Zentrum für Kunst und Medien, or simply ZKM, houses a top-notch collection of media art, in all genres from painting to video and audio—about 9,000 pieces in all—starting from the end of the 20th century. It's an all-day adventure where you can watch movies, listen to music, try out video games, flirt with a virtual partner, or sit on a real bicycle and pedal through a virtual New York City.