Known as the Hintz House, this medieval pharmacy has been an apothecary's haven for nearly 450 years.

The romantic botanic tunnel feels like a well-kept secret.

Moss and stone turn this waterfall into an otherworldly liquid veil.

Some call this eerie forest of crooked trees the "Bermuda Triangle of Romania."

The possible imprisonment of Vlad the Impaler here earned the medieval castle its nickname, "Dracula's Castle."

The legendary cliffside castle of three-time Voivode of Wallachia, Vlad the Impaler.

Once the path of a railway tunnel, now home to thousands of glowing insects.

A former drinking water storage reservoir transformed into a sunken garden.

The statue honors an adventurous seafaring cat.

A special train service transported Sydney's dead from this station to "Necropolis Receiving Houses" at Rookwood Cemetery.

Cockatoo Island is a Heritage-listed island in the middle of Sydney Harbour.

Australian museum dedicated to human health and lack thereof.

It's home to the taxidermy remains of Peter, the dog who helped convict a murderer.

This public park collects signposts and other memorabilia related to local history, Polish-German relations and human progress

This now-defunct synthetic fuel plant was once a major cog in the Nazi war machine.

Ruins of a late 1950s Polish ski jump ramp in the middle of the city.

This abandoned but well-preserved Prussian fortress sits abandoned in a Polish forest near the German border.

The center of this Polish border town was so thoroughly wiped out in World War II that only the foundations remain.

This lakeside bunker complex in Mamerki, Poland, housed the Supreme Military Command of Nazi Germany during World War II.

An extensive network of secret tunnels was created for the Nazi project "Riese."

Gliwice Radio Tower, likely the tallest wooden structure in the world.

This unique railroad museum secretly contains the history of Poland rebuilding itself from the inside-out.

A somber memorial honors the hundreds of thousands of lives lost at this labor and extermination camp.

The two abandoned overpasses are among the largest bridges in Poland.