An ancient Greek monument and a Byzantine church coexist inside this cave.

Heralded as the world's first theater, these ruins are often overlooked as they reside in the shadows of the Acropolis.

The railway carts travelers to central Athens's highest peak, which offers stunning vistas of the city.

A 2,000-year-old computer demonstrates remarkable engineering and astronomical precision.

A crushed gate and giant bronze head serve as a reminder of Greece's fight for freedom.

An ancient octagonal weather station named for the eight Greek gods of wind.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

This 15th-century island fortress later served as home to the executioners no one wanted to live near.

Tucked away amidst some of the most famous addresses in the world is New York's only fraction of a street.

The colorful, smiling concrete silos of Vancouver.

"Girl in a Wetsuit" is what happens when a sculptor has to find a way around a 100 year old copyright.

This lovely, if imposing, piece of Canadian gothic is possibly the most photographed hotel in the world.

Surprisingly Delicious Asian-Style Hot Dogs.

Traditional 15th century Chinese garden in the middle of Vancouver.

The remains of the worst military aviation accident in Canada's history.

This exuberantly curated landscape is one of the largest sculpture gardens in Canada.

A historic Montreal market that was the city's agricultural hub for over century.

The metal truss bridge served as the sole entry point to an "isolation island" for smallpox outbreaks throughout the 1870s and early 1940s.

A giant open-air sculpture made of over 200 full-sized boats.

This 17th-century house was once the trading hub for two prominent Canadian fur barons.

Immortalized in bronze, this frazzled student will be glued to his screen for centuries.

Two thirds of this Montreal neon icon has survived to flash another day.

Every year, the colorful murals of Montreal get a complete makeover.

This steep cable railway has been hoisting passengers in the heart of Québec City for over a century.