From lefty Jewish gathering site to hip cultural site in just 80 years.

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

The hallucinogenic center of the ancient world.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

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

The biggest museum dedicated to insects in North America, one of the largest in the world.

A massive Montreal stadium that has seen nothing but trouble since its inception.

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

Designed by Buckminster Fuller, this relic of the 67 Expo survived fire and ice.

Montreal's colorful subway station shows its support of the local LGBT+ community.

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

One of Canada's oldest museums, the beautiful Redpath has been serving up Natural History and Ethnography since 1882.

Canada's largest graveyard boasts a lot of noteworthy artifacts as well as its own computerized mapping service.

The skyline of Montreal includes the silhouette of an unexpected fruit-shaped Canadian staple.

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

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

A miniature train-ride through Slovenia's largest cave system.

A whimsical bridge adorned with decorative dragons.