From Beyond Space and Time 5

A classic action thriller of the adventures of explorers with an exploration club uncovering a black sphere of unknown origins from where Rudolf Hess crashed during the Second World War, and in a museum the artifact is activated and a strange being appears from its energy field, which turns out to be a human time traveler, from a form of suspended animation, expecting to be revived in the future, and before he dies he tells them of his search for the lost treasures and ultimate technology of colossal value of an ultimate time traveler!
They soon realize what he missed and that he arrived at the wrong latitude, and that the location is at the same exact line through the same longitude, and while searching for it their scanning equipment’s interdimensional detection methods activate something there, and an uncharted interdimensional island appears there.
While landing there the island alters to another dimension trapping them there, but before their scanning equipment stops working they discover an immense structure hidden away on the island.
The group of explorers explore the mysterious island and structure and become fanatical with getting their hands on the lost treasure and what is behind the occurrences there!
They uncover unknown discoveries everywhere as they explore the remains of the structure, trying to determine what is there and what is happening, and they slowly uncover the position of a perfectly symmetric black sphere of transcendent origins.
The explorers uncover the transcendent artifact after it has been buried away for billions of years and discover its true origins and it is the ultimate time machine/voyager when they activate it, and are left stunned when its vast unstable energy explosions blast out across an infinity of outer dimensions with such force that it threatens to warp or rip away and destroy space and time.