Phantasmal (adjective)

1. Of, relating to, or characterized by fantasy or imagination.
2. Visually striking or impressive, but lacking substance or reality.

Origin:

Early 17th century: from french fantasmel, based on greek phantasma "appearance, apparition".

Examples:

1. The phantasmal landscape was filled with surreal, dream-like images.
2. The phantasmal fireworks display was a visual feast for the senses.
3. The phantasmal castle was constructed entirely out of clouds and mist.
4. The phantasmal creatures that inhabited the forest were unlike anything anyone had ever seen before.
5. The phantasmal city was made up of towering spires and fantastical architecture.