Sculpture designed by Turkish artist and professor Mehmet Ali Uysal.

A marble Lucifer hides behind the pulpit of this Gothic cathedral.

This dreamy street will transport you to wintertime in Victorian England.

This Manchester laundromat is hiding something.

A delightful museum entirely dedicated to the tiny homes of dolls.

A 20th-century picture show in 3-D.

The world’s narrowest house makes for an awkward, four-foot-wide living space.

A program of Communist glamour in post-Stalin Poland is preserved in this colorful museum.

Amsterdam's Red Light District leaves little to the imagination.

This massive mural by famed pop-artist Keith Haring was hidden for almost 30 years until its 2018 rediscovery.

In the days before house numbers, these colorful signs held clues about various buildings' purposes.

Tucked in the back of a flower shop, its collection details the fascinating history of the Netherlands's iconic symbol.

This museum housed in a former brothel explores the past and present of sex work in Amsterdam.

This unusual elevator doesn’t stop or slow down.

Sail in for a ’dam good slice.

This unattributed sculpture in Amsterdam is hiding in plain sight.

A Dutch passageway's artistic, aquatic-themed makeover pays tribute to the capital city's famed waterways.

Seven mini rowhouses fill the gap between 54 and 70 Westerstraat.

This 22-floor tower's Skydeck offers panoramic views of Amsterdam.

An ancient passage filled with stalls selling used books, once frequented by Vincent Van Gogh.

Cat art as far as the eye can see.

A floating cat sanctuary on an Amsterdam canal.

This 700-year-old structure is one of the most unique architectural and historic monuments in Gdańsk.

Fall down the rabbit hole into a surreal journey of human consciousness "from ass to soul."