Secret Marvels of the World: 360 Extraordinary Pla - 360 extraordinary places you never knew existed and where to find them

Featuring communist bunkers, burning gas craters and at least one sponge-rock fluorescent grotto built by Polish monks, this book reveals weird and wonderful sights that the crowds don't reach. From eerie natural wonders to historical oddities and bizarre architecture, this is a travel companion for the incurably curious.