In the Netherlands you have this organisation which saves interesting and monumental houses:
https://www.hendrickdekeyser.nl
See for example https://www.hendrickdekeyser.nl/overnachten/huis-van-ravesteyn-utrecht , a house by the modernist architect Sybolt van Ravensteyn
And you probably know already the organisation the iconic houses; https://www.iconichouses.org/
In the Netherlands you have this organisation which saves interesting and monumental houses:
https://www.hendrickdekeyser.nl
See for example https://www.hendrickdekeyser.nl/overnachten/huis-van-ravesteyn-utrecht , a house by the modernist architect Sybolt van Ravensteyn
And you probably know already the organisation the iconic houses; https://www.iconichouses.org/