A gorgeous, Gaudí-esque stairway constructed in the city of Istanbul by a prominent Jewish family.

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

A marvel of Byzantine engineering under the streets of Istanbul.

This crucial gathering spot along the "hippie trail" still displays old notes between traveling beatniks and backpackers.

A fountain standing as a testament to a doomed alliance.

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

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

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

A sacred lake with thousands of sacred carp and a biblical history.

The ancient abodes are a testament to human ingenuity amid harsh climates.

This hunter-gatherer architecture is believed to be the oldest religious complex known.

Balanced on four stone pillars, this historic tower was the site of a tragic political assassination.

Mausoleum and Holy Seat of Antiochus I of Commagene.

Ruins of a German castle on top of a towering stone pillar.

The bridge that cost Germany a World Heritage Site.

A famous big wave from Japan serves as a tribute to the victims of the disastrous Elbe flood.

Tourists often confuse this beautifully ornate former cigarette factory for a mosque.

This Dresden church was purposely rebuilt Protestant after being demolished in World War II.

In addition to fine dairy products, the world's most beautiful milk shop also offers a feast for the eyes.

A unique hanging cable-car navigates through Dresden, the oldest suspension railway in the world.

This World War II-era bunker hides between medieval chapels in Nijmegen's city center.

Once a forgotten city-wall tower, now the centerpiece of an underground bicycle parking.

An ancient irrigation system that turned arid deserts into oases.

Within the Dadès Gorge, amazing vistas and towering cliff faces can be seen at each new curve and bend in the road.