During prohibition, corrupt city officials ran drinking dens under the streets of Downtown Los Angeles.

This stunning iron gate designed by Modernist architect Antoni Gaudí is filled with mythic symbolism.

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.

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

A fountain standing as a testament to a doomed alliance.

Climb a steep hill in 90 seconds on the second-oldest urban subway in the world.

A Turkish ghost town abandoned in a population exchange with Greece.

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

These tombs were built into the side of a mountain so that ancient angels could reach the dead.

Roman ruins top white travertine terraces formed by ancient hot springs.

A marvel of Byzantine engineering under the streets of Istanbul.

This underground transport hub doubles as an art gallery.

Featured in one of the most iconic scenes in cinema history.

The deepest metro station in the world.

Ukraine's oldest operating pharmacy now offers guests a fascinating walk through apothecary history.

One of the largest museums in Ukraine remembers the story of the German-Soviet War in iconic, brutalist style.

340-foot statue built to honour the Heroes of the Soviet Union.

Once the grandest synagogue in medieval Spain, it now stands as a memorial of the 15th-century Jewish exile.

This small, lush island has a long and bloody history.

A pastry shop specializing in Sephardic sweets serves historic recipes in Ribadavia’s Jewish quarter.

An old wool-washing house filled with Fluxus contemporary art.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Construction of Barcelona’s iconic (but controversial) church was finally completed in 2026—a century after the death of its architect.