One of few lasting examples of the brief octagon craze that developed into folly.

Nestled in the heart of San Francisco’s bustling Financial District stands a unique homage to the Mayan and Beaux Arts.

This concrete tangle of square pipes has stood as a proud thorn in the city's side since the '70s.

San Francisco's urban bison herd has persisted in the face of extinction, development, and disease.

An alley way dedicated to graffiti and street art is a constantly changing street gallery.

Stepping away from the glitz of mobsters and casinos to learn about the other history of Vegas.

The statue of John Harvard isn't actually John Harvard—or even, technically, the founder of the school.

This cemetery served as the only official burial grounds in Cambridge for nearly 200 years.

The thousands of shades on display — some toxic, others impossibly rare — are a library of more than just color.

Op-art architecture designed for happiness.

Museum devoted to the artificial language of Esperanto.

Handsomely crafted representations of our round planet.

The beautiful baroque library of the Hapsburg empire.

Inside the corridors of this flea market, visitors are sure to find some obscure and odd treasures.

A set of outdoor stairs named in honor of a famous Austrian artist.

A non-stop elevator ride in Vienna's city hall.

Along the edge of this fountain are 365 smaller fountains that represent the days of the year.

A neo-Gothic church built to thank God for saving the Emperor of Austria from an assassination.

Located right outside of Vienna, visitors can take in expansive views of an ethereal forest.

Celebrate the history of the lucky chimney sweep.

The house that took a plunge into the facade of a museum.

One of the most notable figures in the Wurstelprater’s history is often assumed to be a fictional character.

This series of Baroque passageways in Vienna's cultural center mix old architecture with modern art.

A spherical "micro-nation" in the heart of Vienna.