This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

A communal oasis on Lake Zurich.

An 80-year-old plane tree is devouring an iron bench at Ireland's oldest law school.

A spitting ode to a German serial killer.

Medieval irrigation channels built into the sides of mountains provided Valais with water for hundreds of years.

A narrow passage next to a cafe leads to a courtyard exploding with murals, tags, and paste-ups.

The steepest classic funicular in the world glides along a dizzying incline.

Created by a pair of artists, this former hotel was designed to provide a minimum of everything including comfort.

This 170-year-old Swiss guesthouse built into the side of a mountain is best accessed by a cable car.

A tower-like theater in the Swiss Alps built to withstand the high winds and avalanches of the mountain pass.