Kola Superdeep Borehole

https://en.wikipedia.org/wiki/Kola_Superdeep_Borehole

The Russians basically decided to drill as far into the planet as possible. For science.

 

Dyatlov Pass incident

https://en.wikipedia.org/wiki/Dyatlov_Pass_incident

A story of nine dead hikers who abandoned their camp. They tore their tent from the inside out and ran into the freezing night. Mysterious injuries included one with a missing tongue and another with a fractured skull. Investigators still don’t know what went down.

 

UVB-76

https://en.wikipedia.org/wiki/UVB-76

A mysterious, buzzing short-wave radio transmission broadcast from a station in Russia. Occasionally the broadcast is interrupted by a voice reading numbers and random words. It is unknown what the purpose of the station is.

 

Lake Baikal

https://en.wikipedia.org/wiki/Lake_Baikal

The largest freshwater lake in the world, completely surrounded by mountains. It contains more water than all the North American Great Lakes combined and is one of the oldest lakes in geological history (25u201330 million years old)

 

Saint Petersburg Metro

https://en.wikipedia.org/wiki/Saint_Petersburg_Metro

Known as one of the most beautiful and elegant metros in the world. It also doubles as a bomb shelter and is therefore set very deep underground.

 

Trans-Siberian Railway

https://en.wikipedia.org/wiki/Trans-Siberian_Railway

The longest railway line in the world. It connects Moscow to Mongolia, China and North Korea.

 

Crystal Island

https://en.wikipedia.org/wiki/Crystal_Island

A currently postponed construction project aiming to create the largest structure on earth (floor space)

I can post more if there’s interest…