The Wonderful Worlds of Ray Harryhausen: Volume One 1955-1960 (2017)
This collection contains:
It Came from Beneath the Sea (1955)
After an encounter at sea with an unknown underwater creature, a naval commander works with two scientists to identify it. The creature they are dealing with is a giant, radioactive octopus that has left its normal feeding grounds in search of new sources of replenishment. As the creature attacks San Francisco, the Navy tries to trap it at the Golden Gate Bridge but it manages to enter the Bay area leading to a final confrontation with a submarine.
20 Million Miles to Earth (1957)
The first spaceship to visit Venus crash lands in the sea, freeing a small native Venusian creature called the Ymir. Eventually growing to enormous size, it threatens the city of Rome.
The 3 Worlds of Gulliver (1960)
Doctor Gulliver is poor, so nothing – not even his charming fiancée Elisabeth – keeps him in the town he lives. He signs on to a ship to India, but in a storm, he’s washed off the ship and ends up on an island, which is inhabited by very tiny people. After he managed to convince them he’s harmless and is accepted as one of their citizens, their king wants to use him in a war against a people of giants. Compared to them, even Gulliver is a gnome.