[LJR69]

Need to be very careful. The laws are convoluted and varied between different regions (even within the same region). For example, in the US all buildings built after 1999 are copyrighted! In India you are not allowed to photograph bridges (as these are considered military defenses).

In the UK the law permits a photographer to take a photo of buildings, people, etc from a public place - in other words you can take a photo of what you would see with your naked eye while in a public place. There are of course exceptions to the rule such as military basis and buildings (and railway stations in times of war). However if you climb a fence or wall, or sit on a gate or something which forms part of that property in order to take the shot then you would be considered trespassing. Furthermore if you enter onto private property legally (e.g. when visiting a museum, or a stately home) and take photo's when this has been forbidden in the terms and conditions of gaining entry then the second you use your camera you are trespassing.

The only way to know whether or not you are permitted to take photos and use them of property is to understand the laws of the country/region where you want to take the photos and where possible request permission from the owners.