Beautiful caves. Very beautiful caves. Amazing caves!

Sydney Opera House. The interesting thing about the building is that it was very expensive to build it, it costs 3 times more that expected. It wouldn't build at all if the price were known beforehand.

Sydney Aquarium - the most interesting place here is a aquarium tunnel with sharks, see on the photos.

Very beautiful old mountains. The name is "blue" because of the specific blue fog. This fog is caused by large eucalyptus forest in the mountains.