In most cases, pulmonary embolism is caused by a blood clot in the leg that breaks loose and travels to the lungs. A blood clot in a vein close to the skin is not likely to cause problems. But having blood clots in deep veins (deep vein thrombosis) can lead to pulmonary embolism.
St. Petersburg. 1  St. Petersburg is a city with a long and eventful history. 2  Altai is perhaps the most beautiful region of Russia. 3  Moscow is the capital of Russia, as well as the nationâs epicentre of arts, music, science, academics, and politics.  For a step back in time, Olkhon Island is a wonderful place to visit.
Copenhagen holds a special place in our hearts. We werenât there for long, but each day was a treat to explore this enchanting city. With Tivoli Gardens, Nyhavn, The Little Mermaid and an endless stream of canals, Copenhagen definitely deserves to be named one of Europeâs most beautiful cities.