"Not Suitable For Sleep-Walkers"

 

This image depicts the Monastery of Great Meteoron, the largest and oldest of the six active monasteries in Meteora, Greece.

Situated over 415 meters (1,362 ft) above the Pineios valley floor, it was founded in 1356 by Athanasius the Meteorite.

The complex is part of the Meteora UNESCO World Heritage Site, originally built on towering rock pillars accessible only by ropes or ladders.

Or maybe it's Spalding in Lincolnshire. 

Bonus - Official US ‘Shellfish’ Definition Changed, Removes ‘Having a Shell’