Q:

Single word for "pleasant to look at"

Consider:

It is pleasant to look at. 
So pleasant that you do not want to let it wander out of your sight. 

What would be a word for pleasant to look at? 
Something that's pleasant to my eyes... as said by @Mysti Sinha - eyesome. 

A:

You could call it captivating.  Merriam-Webster defines captivate as "to attract and hold the attention of (someone) by being interesting, pretty, etc." 

A:

If you need a word, this adjective is archaic and it is:

eyesome - (archaic, often poetic) visually attractive. ( MW)

There are also less-archaic terms:

sightly - Pleasing to see; visually appealing. ( TFD)
eye candy - A person who is or people considered highly attractive to look at. ( TFD)

Examples:

It is pleasant to look at. ( sightly)
He is pleasant to look at. ( eye candy)

A:

comely - pleasing in appearance; attractive; fair

