The Retro and Futuristic Architecture and Abstract visions of London's Underground Stations and Tunnels. It might seem like a nightmare on weekday mornings but the London Underground is actually uniquely beautiful when empty. From retro wall tiles to futuristic escalators, it's a photographer's dream. CALVENDO has chosen this calendar for its Gold Edition. Calvendo calendars are premium products - a bit more pricey than others but with added benefits: Our calendars always look beautiful on your wall because we produce them locally with premium paper and sophisticated spiral binding, ensuring easy turning of pages and flat hanging against the wall. A protective transparent plastic cover sheet provides added stability. Treat yourself to a Calvendo calendar and you get something that looks better all year round.