This reminds me the 1968 Brazilian movie "Roberto Carlos em ritmo de aventura" when a pilot flow an helicopter inside the 250m (~ 820 feet) long Túnel Novo (New Tunnel) connecting the neighborhoods of Copacabana and Botafogo.
What is funny you could still buy this helicopter, Schweizer 300, brand new up to 2002 as it was designed in 1955! ~Same carbureted engine with zero automation and 40L/h fuel consumption. No engine governor means pilot manually controls engine rpm, you are the ECM having to correct for air temp and pressure altitude, worry about icing and manifold pressure.
All thanks to stupid US aviation policies - recertification is so expensive nobody does it and everyone flies dangerous shitboxes despite >50 years of innovations.
https://youtu.be/ab8bVouGtwU
Minute 0:57 to be more precise.
Also, you can enjoy Rio de Janeiro from above in the 60s.