nostr:npub1zdp33shl69xr0uq3x8n5gsjykq9upycwh6nqm02c3f6x0frrn0dq42vqv8 I'd show them around the Centre for Alternative Technology (celebrating their 50th year!) as an example of how humans can transform an inhospitable and barren former slate mine into a beautiful and sustainable village using amazing techniques and materials. 

https://cat.org.uk/