I used ubiquiti rocket M5 to go from my house (without internet) to my parents house (21km away). It works well (50mbit/s).
For the curious: https://www.reddit.com/r/homelab/comments/j4y4f4/my_21km_p2p...
For the curious: https://www.reddit.com/r/homelab/comments/j4y4f4/my_21km_p2p...