A stone from Africa's tallest peak is immortalized in a Potsdam palace—but is it actually the mountaintop?

This elevator was built in 1907 to connect two neighborhoods separated by a steep, rocky cliff.

An underground network of massive stone arches and their skylit vaults support ruins of portico structures above.

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

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

Have tea in a cemetery with a dazzling view of Istanbul.

This historic hotel preserves many treasures from its heyday hosting passengers on the Orient Express.

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

A fountain standing as a testament to a doomed alliance.

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

A marvel of Byzantine engineering under the streets of Istanbul.

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

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

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

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.

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

Over the centuries, this island paradise has done it all, from providing monks with ecclesiastical respite to sheltering an exiled Leon Trotsky.

One of the largest wooden constructions in Europe was meant to be a casino, but soon became an orphanage.

A NATO bombing took the lives of 16 civilians in 1999—the ruins remain in the center of Belgrade.

This abandoned but well-preserved Prussian fortress sits abandoned in a Polish forest near the German border.

An astonishingly accurate water clock that doubles as an hourly spectacle in this Berlin shopping area.

The medieval ferry service has been going strong since the 14th century.

A purr-fectly spirited bronze celebration of local street felines through history.