Entrance to Sintersee underground lake, Tropfsteinhöhlen Cave, Austria.

#caving, #speology, #Adventure, #geology, #europe

Gardens by the Bay, Singapore

#travel, #singapore, #asia, #landscape

Bavaria, Germany

#travel, #europe, #germany, #nightscape, #nature

by Osdu on Flickr.Cathedral of Our Savior on the Spilled Blood, St Petersburg, Russia.

#Sankt-PetÄ›rburg, #Sèng Peterburg, #Petrohrad, #Sankt-Peterburgo, #Sant Petersburg