Ultimate Realism (Dark) is an amazing texture pack which has photos directly taken from around the world, and then implemented into minecraft. Making it the most beautiful realistic texture out there. It also blends the real world textures with minecraft, giving it a aesthetic look, while keeping a vivid look.
How to Install Ultimate Realism (Dark) Texture Pack for Minecraft
In order to use HD texture packs properly (32× and higher) you will need to either patch your Minecraft using MCPatcher or using OptiFine. Optifine is preferred as it includes all of the features of MCPatcher, and greatly increases game speeds and graphics settings. MCPatcher tends to be updated on the same day as Minecraft updates, so use it instead if you are in a hurry.
Credits: Dr PhD