"delightful sight" is correct and usable in written English.
You can use it whenever you want to describe something pleasing to look at. For example, "The sunset over the ocean was a delightful sight."
Bicycle-kick goals are a rare, delightful sight.
(Her entrance, in burka accessorized by Hello Kitty backpack, does make for a delightful sight gag).
As for the more public celebrations, midnight at Marine Drive sea face in south Mumbai is a delightful sight.
It was a delightful sight: thousands of teenagers dressed in the style of their favorite Japanese animated cartoon characters.
WHO could refrain from sniggering at the delightful sight of PricewaterhouseCoopers (PwC), the world's biggest and most cumbersomely named accounting practice, being knocked about by America's Securities & Exchange Commission SECC)?
On entering through the canopy of trees from East Ferry Road, you're greeted by the delightful sight of cows and sheep roaming freely on the grassy 13-hectare (32-acre) site.
The event ended with one of most delightful sights I have ever seen: fifty little girls and about 10 boys came on the stage to dance the Hula to a song called "I am Happier When You are Near Me".
But images of octogenarians soaring in the spray -- and laughing while they do it -- remind us of a better reason for surfing's grip on the national imagination, one having nothing to do with baby boomers: there's simply something delightful about the sight of anyone, young or old, standing upright on a breaking wave.
The older footage is particularly delightful, including the sights and sounds of a grinning, goateed Mr. Kienholz bargaining with a junkyard dealer to buy a 1953 Cadillac door that probably ended up in one of his amazing assemblages.
Mexico City, Mexico - Mexico City is a delightful chaos of sights, sounds, and colors.
What followed was a steady flow of food... 13 courses of delightful flavors, tastes, sights and smells.
