This column celebrates Rome's victory over the Goths, and may be the oldest Roman monument in Istanbul.

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

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

A marvel of Byzantine engineering under the streets of Istanbul.

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

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

Built into the wall of this pub is a unique marker detailing the distance to Dublin.

Tiny silver and copper fish set inside blue-green lights are like windows to the underwater world.

A well-preserved, 19th-century Irish workhouse recounts a grim time in the country’s history.

“Ireland’s only inland lighthouse” is not actually a lighthouse at all.

The remains of a 13th-century Norman fortress, largely destroyed by an explosive renovation.

This Irish church has a striking circular design inspired by the ancient Grianán of Aileach.

Commemorating the end of independent Gaelic Ireland.

A small collection of objects of a bygone era hide in plain view.

The Guinness Record holder as the "tallest cinema in the world" is a building with screens in almost every one of its 12 floors

This Georgian mansion blends historical significance with an impressive art collection within picturesque surroundings.

This vessel is the final ocean-going paddle steamer in the world.

This museum offers a glimpse into early 20th-century Glasgow life.

Inside this art museum resides one of Glasgow's most famous musical instruments.

Displaced highlanders would take shelter from the wet Scottish climate under the large walled bridge at Glasgow Central Station.

An icon of the Battle of Britain is frozen in flight in a grand Victorian museum.

The ornate structure is part of a building boasting more marble than the Vatican.

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

A scattered trail of street art adds a pop of color to the city's stark structures.