The medieval center of the Islamic world was also once the seat of Saladin's sultanate.

One of its engravings is believed to be among the first representations of medical and surgical instruments.

This ancient structure is widely thought to be the oldest intact pyramid in the world.

These Egyptian statues have survived for 3,400 years and were an acoustic wonder of the ancient world.

Ozymandias’ time-keeping temple.

Orcas on display and in the water.

This family mausoleum is steeped in symbolism and looks more like a fantasy location than a grave.

This verdant, tree-lined Reykjavik graveyard is both enchanting and eerie.

This tiny museum's sizable collection is jammed into a former underground public toilet.

An encyclopedic collection of mammal penises.

This fantastical waterfall is hidden in a cave located in a cracked cliff.

There is no trying to fall in love with this Star Wars fountain, you just do or do not.

At the base of the Golden Gate Bridge, a small sign basically begs for a high-five.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

The oldest house in the capital of Silicon Valley.

A giant chess set, minus the psychedelic drug trip.

The headquarters of a secretive order is also a beautifully-designed park.

An extensive collection of ancient Egyptian artifacts and mummies.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

Outside of one of Britain's most renowned social clubs, a step installed specifically for the Duke.

According to legend, this tomb holds the secrets to time travel.

The bronze uniforms commemorate the vital role of women during World War II.

The fences outside some of South London's estates are made from recycled World War II stretchers.

The Metropolitan Police refurbished the blue box (perhaps not coincidentally) the same year "Doctor Who" returned to TV screens.