Globe for iPad, free
https://itunes.apple.com/gb/app/globe-for-ipad/id387435363?mt=8&affId=2311818&ign-mpt=uo%3D4
Google Earth, free
https://itunes.apple.com/us/app/google-earth/id293622097
fotopedia Heritage from National Geographic, free
https://itunes.apple.com/gb/app/fotopedia-heritage/id383327395?mt=8&affId=2311818&ign-mpt=uo%3D4
fotopedia National Parks from National Geographic, free
https://itunes.apple.com/us/app/fotopedia-national-parks/id406969208
Colosseum 3D
https://itunes.apple.com/us/app/colosseum-3d-interactive-virtual/id672620829?mt=8
Free version is very short view, but interesting
Sistine Chapel 3D
https://itunes.apple.com/us/app/sistine-chapel-3d-interactive/id639603021
fotopedia Paris, free
https://itunes.apple.com/us/app/fotopedia-paris/id427149531
fotopedia Italy, free
https://itunes.apple.com/app/id568886129
Dreams of Burma from National Geographic, free