onchain-blocks

https://frame.weponder.io/api/polls/13774

Alchemist. 
Block Builder. 
Creator.
Degen. 
Ethereum dev. 
Farcaster Framer.

batcave is prime real estate. tricked out cave? hell fucking yes. I don't even need the mansion above it.

✔️ waterfall
✔️ giant penny
✔️ crazy computer
✔️ catwalks and platforms

mansion is not included but as you pointed, no need of mansion with that cave, 

it is enormous, fast access to the city, full of computer devices and rare tech, can monitorize the city and even include a waterfall

the giant penny, lol, is a very great extra, brilliant choice