The story of a domesticated dog’s return to a primitive state in the late 19th-century Yukon.

A wild half-wolf survives a harsh existence before finding love and domestication in civilization.

Five Americans, balloon-wrecked on a deserted island, must find a way to survive while revealing the island’s strange mysteries.

Prompted by a mysterious Icelandic manuscript, a professor and his nephew, with the aid of a local guide, adventure to the center of the earth through the crater of a dormant volcano.

Three men attempt to cross Africa by balloon.

The wife of a lost fisherman finds his last message to her: a lottery ticket in a bottle.

An engineer returns to a depleted coal mine at an old friend’s request and investigates mysterious happenings.

A young sea apprentice finds himself in charge of a ship, which is led astray to a land where the slave trade abounds.

A mysterious captain assembles a ship and crew for a secret and dangerous voyage.