earthly paradise; heaven on earth
A set phrase describing an ideal, blissful place on Earth, often used figuratively for beautiful natural spots or perfect living conditions.
This island is truly a heaven on earth.
楽園 is a general word for 'paradise', while 地上の楽園 specifically emphasizes a paradise existing in this world, not in an afterlife.
Compound of 地上 (on earth) + の (possessive particle) + 楽園 (paradise). The phrase is a direct calque of the English 'earthly paradise' or 'heaven on earth', and has been used in Japanese literature and travel writing since the modern era.