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

An open-air museum dedicated to tombstones and roadside stone monuments.

A museum dedicated to the former country.

The ruins of a military-industrial complex now host concerts and more.

This celebration of Latvia’s freedom and independence avoided demolition over half a century of Soviet occupation.

One man's unrequited love stands in a glass box forever.

The oldest surviving wooden bridge over Rhine lets travelers cross easily from Switzerland to Liechtensten.

In the parking lot of a fast food restaurant, a statue memorializing a prolific bull elephant.

Nearly four centuries after its founding, remnants of one of the oldest planned communities in North America are still visible in southern Brooklyn.

Explore a traditional Albanian dwelling that pays tribute to the region's rich history.

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

The United Arab Emirates's biggest and oldest fort pays homage to a lost era.

This museum explores the tumultuous history of Lviv under Nazi and Soviet occupation.

The reconstruction of this prominent building fulfilled a long-written command.

This hidden oasis features a stunning view of the Hudson River and the Palisades from a castle-like museum.

The last remnants of Fort Pitt also hold the distinction of being the oldest structure west of the Allegheny Mountains.

This subterranean oyster house has been the pearl of Grand Central Station since 1913.

You must take the A train... to the last active cemetery in Manhattan.

This hotel was once home to a steamliner company and became the final rest stop for Europeans heading to the New World.

This crumbling medieval basilica once attracted pilgrims by the thousands to collect a miraculous dust that formed above the saint's tomb.

Carvings in Turkey's Marble Road may have directed ancient Romans to a hidden brothel.

Seven early Christians were sealed into a cave where legend has it they slept unharmed for centuries.

The ancient latrines of the Greeks, in all their public glory.

Mausoleum and Holy Seat of Antiochus I of Commagene.