Tilt Shift Photography is one of the most popular photography techniques out there, and it's achieved by using special tilt-shift lens or by digital post-processing (also known as "fake" tilt-shift). Tilt Shift effect in other words means simulating a miniature scene. Is like creating a visual illusion mainly by adjusting camera movement and focus.
What's so damn cool about it is that it makes everything looks like a miniature, toy version of itself. Here are a few particularly striking examples of the form.