Oliver Messiaen - Réveil des Oiseaux

https://www.youtube.com/watch?v=sgNeH9_8l0w

Beethoven - Symphony No. 6 in F Major, Op.68 (also known as the Pastoral Symphony)

https://www.youtube.com/watch?v=9ORsinmqm0M

And here is Beethoven walking in nature:

Finding inspiration in nature: 

That’s a very good performance of the Sixth. I love this work.

Beethoven: Symphony No. 9 (The "Choral") in D minor, Op. 125. Perf. by Bayreuth Festival Orchestra conducted by Wilhelm Furtwängler, with soloists Elisabeth Schwarzkopf, Elisabeth Höngen, Hans Hopfer, Otto Edelmann.

https://youtu.be/OlyxFCvE6IQ

This is the 1951 live performance without the Walter Legge edits. It's utterly thrilling, certainly one of my favourite renditions.

Donizetti: Sul suo capo aggravi un Dio... Va', infelice, e teco reca (from Anna Bolena). Sung by Edita Gruberova and Dolores Ziegler.

This is the big scene (recitative and duet) for the two women (Anna Bolena and Giovanna Seymour) when Anna knows she's going to be beheaded. Some of the greatest bel canto singing ever performed.

https://youtu.be/b1llhHFTJjY

A bit long, but we all like starry nights and it is quite powerful...

Messiaen - Des canyons aux etoiles

https://www.youtube.com/watch?v=5DjgpPL7RhA

Vaughan WIlliams - Suite for Viola and Orchestra (1934)

https://www.youtube.com/watch?v=viqvAQA1tOw

Marín: Ojos pues me desdeñais. Sung by Montserrat Figueras, accomp. Rolf Lislevand (baroque guitar)

https://youtu.be/wpJuaxtH79o

Mi Chiamano Mimi - from Puccini's Bohème 

Sung by Maria Callas

https://www.youtube.com/watch?v=tkvCMLwBWH4

And here is another performance (by Dame Kiri Te Kanawa)

https://www.youtube.com/watch?v=6tFGGPY1AEs

Juan Serqueira de Lima: Ay, Leonida. Sung by María Luz Álvarez, with Accentus Austria (directed by Thomas Wimmer).

https://youtu.be/g6raV6duL9E