Castle of Palmyra
Palmyra, nr Springfield, Illinois, USA

If you don’t fancy playing politician and staying in Springfield on your visit, take a leaf out of our book and go ‘royal’ instead. In just under an hour’s drive from the state capital sits this fabulous folly, set in a 40-acre forested estate. It even boasts a private lake, complete with a sandy beach. It also has its own private observatory for the stargazers and dreamers among us.