Below a historic English market town lies a secret underground city complete with kitchens, laundries, storerooms, and an underground lake.

Hear the quietest sound from across the dome.

A hands-off space for graffiti artists to hone and display their skills.

A mysterious artist-run cabinet of curiosities and library.

To gaze upon the visage of Sri Lanka's biggest Buddha, one must first pass through the Tunnel of Hell.

This peaceful, round shrine in the middle of the Sri Lankan jungle acts as a beacon of peace.

An ancient stone fortress considered by many to be the eighth wonder of the world.

This elaborate temple was built around one of the Buddha's teeth.

A Bohemian "anti-hotel" offers off-kilter stays in Sri Lanka.

Once thought to be the Garden of Eden it holds a holy footprint claimed to belong to Adam, Buddha and Shiva.

Spend the night inside a two-story elephant villa.

A metal tree emits eerie, melodic notes on top of Lancashire's Crown Point.

Dating back almost 400 years, the oldest public collection library in the United Kingdom was once the study hall of Karl Marx.