A favorite Paris bar for U.S. expats, including Gershwin, Hemingway, and James Bond.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

This modest marker near Notre Dame identifies the very center of Paris.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

These historical landmarks stand as reminders of the evolution of animal care and conservation.

Hundreds of signs pointing to the birthplaces of current Helsinki residents form stalactites on the ceiling of the cave-like Kamppi metro station.

Dedicated to the outnumbered Finnish forces who pushed back Soviet forces during the conflict.

This church also serves as a lighthouse complete with a beacon.

The door to the museum holds a unique artifact from the Finnish Civil War.

In the waters outside Helsinki, a tiny island once used as a military outpost now welcomes visitors.

The tiny, studious rodents greet visitors to the National Archives of Finland.

A collection of collections ranging from dentistry to minerals.

These enormous, stern-faced statues greet visitors with lanterns, and sometimes costumes.

This irregularly shaped sea fortress has defended not one but three different sovereign states.

An abstract monument to a symphonic composer.

A small island dotted with old, historic Finnish buildings.

A subterranean house of worship carved right out of the bedrock.

Architecturally stunning library serves as the hub of Finnish scholarly life and culture.

An alien church provides much needed silence in the midst of a Finland shopping center.

A cathedral resurrected from the ashes of one of Europe's greatest urban fires.

The colonial city's social history is reflected in its fanciful door knockers.

Perched atop the highest hill in Cartagena, this 17th-century convent offers spectacular views of the city.

From a distance, Latin America's first Baha'i Temple looks like an enormous egg perched atop a hill.

Along a coast that sees the annual migration of humpback whales, a geological formation that takes the shape of a whale’s tail.