Early habitat dioramas and home of the elusive gaff, the skvader.

A 1:42 scale model of the world's second largest lensed telescope.

A concrete mushroom that divided Stockholm residents for nearly a century.

A prehistoric geological oddity tucked behind Stockholm's natural history museum.

A concrete Picasso in the middle of a student housing complex on the outskirts of Stockholm.

A Stockholm metro station is home to an escalator that is not only the longest in Sweden, but among the longest in the world.

Stockholm's narrowest alley is barely over two feet wide.

Street artists transformed this abandoned industrial neighborhood into one of Europe's largest graffiti exhibitions.

Sweden's "good old days" painstakingly re-created in a model village.

The world's largest model of our planetary system.

The library's graceful rotunda is like a bibliophile's temple.

A larger-than-life house of cards stands outside the house of a former fashion designer.

Remnants of cone-shaped fascist bomb shelters in Milan.

Since 2017, the remains of Stretford's industrial past have been occupied by a collection of gnomes.

The fake World Cup prize was secretly created after the first one was stolen in 1966.

Dedicated to the history of the health sciences.

Once adorning a New York skyscraper, these reclaimed ruins now haunt an Indiana park.

A medical facility that has been kept frozen in time.

One of Detroit’s oldest blues clubs stands in defiance of the passage of time and the city’s shifting fortunes.

A Museum of Holography frozen in 1974.

A spectacular remnant of an Adler and Sullivan masterpiece that was destroyed in 1972.

A beloved Chicago music venue offering cold beer and lots of “Friendly."

A gothic church spire sits atop this skyscraper, the tallest church in the world.

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