The abandoned castles of Europe are magnificent markers of the continent’s tempestuous history. But where they once hosted royalty, these empty, hulking structures are now overtaken by the wildlife and rich natural environments flourishing around them. From peregrine falcons ruling the bell towers of Germany’s Heidelberg Castle, to exotic amphibians thriving in the spring-fed fountains of Spain’s iconic Alhambra, explore the curious history of these imposing European structures and the creatures that call them home.
Part 1: Heidelberg: Secrets in Stone
Standing deep in the German countryside for over 500 years, Heidelberg Castle was once home to the country’s first university and is now part of the surrounding ecosystem. From toads swimming in the grounds’ fountains to peregrine falcons nesting in the bell tower, tour a medieval mausoleum steeped in nature.
