The elegant manor house where Kaiser Wilhelm II lived in exile after World War I.

This historic pub has maintained much of its 1906 decor, including a small sequestered room for women, where orders were slipped through a tiny window.

Thousand-year-old Viking runes adorn an ancient Greek lion at the entrance to the Venetian Arsenal.

This amazing 15th-century mural remained hidden in plain sight for centuries.

The rusted remains of an ill-fated freighter lie just off the coast of South Manitou Island in Lake Michigan.

Every January 6, young men dive into Spring Bayou in search of a cross and a year's worth of maritime blessings.

The oldest cemetery of modern-day Athens blends the modern and ancient worlds.

Ruins of a 13th-century fortress perched above a breathtaking Mediterranean bay.

This king penguin is a knighted brigadier of the Norwegian Army.

A Turkish ghost town abandoned in a population exchange with Greece.

An abandoned Byzantine fortress and notorious prison.

The ruins of an abandoned medieval city where the last Byzantine emperor was crowned.

The ruins of an ancient Roman tomb hidden in the basement of a trendy clothing store.

The railway carts travelers to central Athens's highest peak, which offers stunning vistas of the city.

There are many Byzantine-era churches still standing in Athens, but this is the only one with a 2,500-year-old column rising through its roof.

Edison's cast-in-place concrete houses were a failure, but way ahead of their time.

This vintage "streetcar boat" lay at the bottom of Lake Minnetonka until the 1980s.

This overlooked museum houses an amazing collection of rare, antique typewriters.

Hidden in the shadow of a rocky fortress is one concubine’s long-forgotten legacy.

This Seattle joint serves food inside an old train car once used by FDR.

A collection of over 2000 air-moving devices of all kinds displayed in the Fanimation headquarters.

The early data processor factory founded in Washington for the 1890 U.S. Census went on to become IBM.

Two hundred tons of pioneer artifacts were painstakingly recovered from a shipwreck at the bottom of the Missouri River.