One of the newest mosques in a city filled with thousands.

Taking the subway here means doing so over a bridge located in the middle of an estuary.

A tiny park in the middle of some big power politics.

Climb a set of vertiginous stone steps to the top of this impressive ancient edifice.

A section of the long chain that blocked enemy ships from entering Constantinople.

No one is sure if the world's fourth-largest diamond had been found in a rubbish heap or was pawned by Napoleon's mom.

Ancient serpentine sacrifice holder that has stood the test of time.

This half-forgotten fortress was constructed by the Ottoman conqueror of Constantinople.

The most metal church of all time was built in record time because of an international, pious pissing contest.

A sixth-century Byzantine cistern hidden below a modern carpet store.

Legend says if you stick your thumb in the hole and it gets wet, your wish will be granted.

1513 Turkish world map, full of European state secrets and snarky commentary.

Five sultans and their families rest in eternal splendor, teeming with overlooked beauty and drama.

A small etching on the white marble parapet was written in runic script by a Viking mercenary.

The ornate miniature mansions were built for Istanbul's feathered residents.

This remarkably well-preserved Egyptian plinth is pretty well traveled for a giant piece of stone.

Be on the lookout for the symbolic insect all over the city.

Brass bricks outline the locations of Edinburgh's lost, lively market stalls.

There are plenty of wonderful panoramic vistas in Edinburgh, but not many are hidden smack in the middle of the Old Town.

One of only three examples of a stained glass window manufactured by the Tiffany Company in Scotland.

This stately monument has been wearing a traffic cone hat for decades much to the delight of the locals.

Largest lake in Great Britain measured by surface area.

The location of the Bridge of Death and the Gorge of Eternal Peril in "Monty Python and the Holy Grail."

This sculpture commemorates Edinburgh's sister city and their respective celebrity dogs.