Down (2017)

When a secluded and forgotten mansion becomes open to the public, two friends are the first to enter it in thirty years. Thomas, an adventure video blogger, faces his most anticipated location yet, 'The Levisson Mansion' and invites his estranged childhood friend, Leo, as an attempt to rekindle their once-strong friendship. The unexpected occurs when they discover a decrepit, yet functioning, elevator in the basement that doesn't go to floors above, but down, deep into the unknown. The two let their childhood curiosity take over and flip the switch for 'down'.