A Montreal deli that was so beloved that it was allowed to circumvent their laws of language.

Montreal's giant farmer's market is a foodie's best friend, especially in the winter months.

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

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

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

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

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.

No one is sure if the world's fourth-largest diamond had been found in a rubbish heap or was pawned by Napoleon's mom.

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

A fountain standing as a testament to a doomed alliance.

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

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

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

A small etching on the white marble parapet was written in runic script by a Viking mercenary.

A marvel of Byzantine engineering under the streets of Istanbul.

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

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

This memorial honors thousands of enslaved Africans and their descendants who died in colonial New York.

The oldest surviving bridge in New York City, which reopened to pedestrians in 2015.

“Invented in Key West, Perfected in Brooklyn."

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

At the most northwestern point of the contiguous United States lies a trail leading through an ancient forest to stunning cliff-side vistas and massive oceanside caves.