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

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

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

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

Roman ruins, natural methane fires and a lovely beach.

This arch granting triumphal entrance into Antalya was designed to honor the emperor's visit.

The deepest underground city in Turkey was designed to protect 20,000 people behind massive stone doors.

While not Turkey's deepest underground city, this subterranean redoubt is the largest.

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

In this historic region, homes and churches are carved into ancient volcanic rock formations.

On any given day this sprawling market houses literally tons of government-regulated gold, gems, and precious metals.

Billed as the "largest natural flower garden in the world" this Middle Eastern show field has little competition at 45 million flowers.

A hidden lane full of top-quality street art.

Incredible rock formations jut from the southern end of this spectacular stingray-viewing spot.

A small, but award-winning beach known for its literally spotless reputation.

The only pollutant in the clear blue water is sunscreen.

Rainbow shutters decorate this former police station.

This house is one of the most colorful in the country, and is the last remaining example of a historic villa.

This underwater sculpture park is the basis for a manmade coral reef.

Hindu temple of the dead home to hundreds of long-tailed macaques.

A stately palace has been converted into the world's largest cannabis museum.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

These secluded and abandoned anti-aircraft defenses have become one the most scenic viewpoints in Barcelona.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.