hyborianbabe:

The most beautiful Elven city built on Middle-earth was said to be Gondolin, the Hidden Kingdom. This was the last Elf-kingdom to survive the War of the Jewels. Its king was Turgon, the Noldor lord, who wisely chose to conceal the city in the Encircling Mountains. However in the end the servants of Morgoth discovered it; Orc legions appeared before its gates, together with Trolls and fire-breathing Dragons driven on by the Balrog demons. Though the elves battled valiantly Gondolin was sacked, and with its destruction the Elf-realms of Beleriand were brought to an end.

From A Tolkien Bestiary by David Day. Art by John Blanche.