authentic space recordings

The vast majority of classical music is recorded in such a way that captures the original acoustic space the musicians were playing in. 

The microphone configurations used in classical recordings are designed with that as a major goal, i.e., Blumlein, XY, A+B, ORTF, Decca tree. 

I listen to mostly mid 20th century, and up to the current era, classical music, so your mileage may vary (musically speaking), but the following recordings have a ridiculously 3d soundstage and detailed image. 

The Cleveland Orchestra recorded this also, and released it on their own label, and it is almost at good. 

This is on the Nonesuch label. Back in the 70's they did an entire series of modern and avant-garde classical recordings, that are universally great with regards to reproducing that sense of space. 

The jazz label, ECM is known for their natural, spacious soundstage reproduction, although, I don't think many of their recordings are done with the "purity" of classical recordings. 

Also, ECM was very respected during their vinyl era for sound quality, and they took it very seriously. They pressed their recordings on some of the best quality available, so they were super quiet.  

Gallery - David Samuels vibes, David Darling cello, Paul McCandless oboe, Ratso Harris bass, Michael DiPasqua drums.

Azimuth with Ralph Towner - Départ

Kenny Wheeler flugelhorn, Ralph Towner acoustic guitar, John Taylor piano, Norma Winstone voice. 

Keith Jarrett piano, Jan Garberak sax, Palle Danielsson bass, Jon Christianson drums - Belonging

ECM made a great transition to CD too, and the maintained their high standards for musicians. Their recent releases have been great sounding, with a new crop of very creative and talented musicians. 

Craig Taborn - Daylight Ghosts

Michael Formanek - Small Places

Ralph Allessi trumpet, Andrew Milne piano, Ravi Coltrane sax, Drew Gress bass, Mark Ferber bass - Imaginary Friends

Dominique Pifarély Quartet - Tracé provisoire

And so many more old and new releases. 

In 1980 the Grateful Dead did a series of shows at The Warfield in San Francisco and Radio City Music Hall in NYC. They performed an acoustic first set and then two electric sets at each show. The recordings culled from these shows were released on two double albums: Reckoning and Dead Set, acoustic and electric respectively. The stage mics, placed close to the voices and instruments were recorded to two synced 16-trk tape machines and the room mics, capturing hall ambience were recorded to two 4-trk machines. During mix down the signals from the close and distant mics were blended and phase aligned yielding a recording that captures the robust, immediate quality of the stage mics and the ambient, crowd noise of the room mics without any time smear. This unique approach to live recording creates a good approximation of being in the audience. On vinyl, these records also have tremendous dynamic range, capturing the Dead's proclivity to play somewhat quietly and then very loudly. Fun!