These numerous Israeli caves were dug out over hundreds years for reasons ranging from hideouts to burial sites.

Hidden beneath a washing machine in a fake kibbutz, this secret bullet factory has been preserved as a museum.

As the Dead Sea continues to deplete, massive sinkholes open along its banks.

Neighborhood in Jerusalem is home to the ultra-orthodox haredim.

An ancient tunnel in Jerusalem built to redirect water in the event of a siege is one of history’s great architectural innovations.

Descend 2,030 years into the past in an ancient tunnel built to support Jerusalem's most famous wall.

After over 100 years out of service this landmark windmill once again turns as a symbol of Jerusalem's self-sufficiency.

This lovely, if imposing, piece of Canadian gothic is possibly the most photographed hotel in the world.

Underwater art project will double as a massive artificial coral reef to help regenerate the damaged ecosystem.

Possibly the world's largest coin stands just outside of a Canadian science center.

Niagara Falls holds a special place in Nikola Tesla's history, so they put a statue on it.

Marvel of green building techniques that sings with the wind.

A 98-room castle in the middle of Toronto that bankrupted a 19th century electricity multimillionaire.

The Incredible Hulk, Yoda, Mulder and Scully, and many many others watch over the mean streets of Toronto.

This unusual structure may be on its way to becoming a cultural landmark in Toronto.

One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.

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

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

An ancient and majestic fortress that played an integral role in Portugal's road to independence.

Berthed at the Charlestown Navy Yard in Boston, "Old Ironsides" is the oldest commissioned warship still afloat.

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

The American Revolution was galvanized into serious action due to the tragic clash with British soldiers that occurred at this location.

A mysterious stone embedded at the base of a historic Boston building.