The gorgeous M13 globular cluster located in Hercules is easily visible to the naked eye at magnitude 5.8.
The cluster is also a nice target for beginners in astro-photography. At an apparent size of 23 arcminutes it shows up well even in large format cameras.
The following image was taken this weekend, despite a moonlit summer night with poor darkness.
William Optics ZS80II, Canon 300D
5 x 5 mins @ ISO400