The fairy tale castle of the "fairy-tale king."

The ruins on a deserted tropical island in the Philippines bear the scars of WWII.

The deepest metro station in the world.

340-foot statue built to honour the Heroes of the Soviet Union.

A reconstructed medieval gateway that was the magnificent entrance to the capital city dating back to 1037.

This hidden collection of everyday objects illustrates life within communist Poland.

A tribute to the Polish insurgents who fought in the failed attempt to end their city's Nazi occupation.

A strenuous, unofficial trail leads to spectacular views in one of America's most remote national monuments.

This Native American settlement dates back to the Pueblo II period.

The final resting place of the businessman-turned-astronomer who helped discover Pluto stands near his observatory.

This quiet chapel was central to a community of settlers who reclaimed an abandoned fort.

A geological mystery on Camelback Mountain.

This immigrant bridge once spanned the Thames but is now a fixture of an Arizona city.

This public square capitalized on a single Eagles reference to bring some life back to an Arizona town.

A natural history wunderkammer in the middle of the desert.

A wild west cemetery in Tombstone, Arizona, provides a window into the Old West.

This 40-room dwelling tucked within a cliff was built by the basin's prehistoric residents.

Walk through the actual strap iron cells and solitary chambers of Arizona Territory’s first prison.

The world's largest military aircraft cemetery.

A motel dedicated to Southwestern nostalgia.

Some of the tallest ancient American ruins continue to inspire awe and curiosity.

This Arizona observatory is famous for investigations into Martian life, and as the place humans first spotted Pluto.

The largest natural travertine bridge in the world is nestled in a small canyon in central Arizona.

On the outskirts of a reborn ghost town, a decaying post office remembers the bad old days.