It's hard to beat the experience of seeing something with your own eyes, but with the digital age opportunities, you can visit some of the world's famous landmarks and museums virtually.

Some of those places offer free online tours and some you can view via Google Earth and Google Arts&Culture.
Here's list of Virtual Museums
  • The Louvre - Paris
  • The Solomon R. Guggenheim Museum - New York City
  • National Gallery of Art - Washington, D.C.
  • British Museum - London
  • Smithsonian Nat. Museum of Natural History - Washington, D.C.
  • The Metropolitan Museum of Art - New York City
  • The Dali Theatre Museum - Figueres Catalonia
  • NASA - Virginia, Ohio and Houston Centers
  • The Vatican Museums - Vatican City
  • The National Women's History Museum - Alexandria, Virginia
  • National Archaeological Museum of Athens - Athens, Greece
  • Uffizi Gallery - Firenze, Italy
  • Hagia Sophia - Istanbul, Turkey
  • Pergamon (Bergama) Museum - Bergama, Turkey
  • Pergamon Museum - Berlin, Germany
  • Orsay Museum (Musee d'Orsay) - Paris, France
  • Rijksmuseum - Amsterdam, Netherlands
  • State Hermitage Museum - Saint Petersburg
  • Panorama 1453 History Museum - Istanbul, Turkey
  • Istanbul Toy Museum - Istanbul, Turkey
Virtual Landmarks
  • Taj Mahal
  • Eiffel Tower
  • Great Pyramids of Giza in Egypt
  • Stonehenge
National Parks
  • Grand Canyon National Park - Arizona
  • Redwood National and State Park - California
  • Yellowstone National Park
  • Yosemite - California
  • Acadia National Park
  • Arches National Park - Utah
  • Death Valley National Park - California
  • Joshua Tree National Park - California
You can go to these museums' websites to check out their free online exhibitions or go to https://artsandculture.google.com and https://earth.google.com to see any place you desire to discover from your home.