Three connected pink triangles memorialize persecuted gays and lesbians throughout history.

A curious collection dedicated to human and animal anatomy and pathology.

The world's first zoo for microbes collecting the horrible and wonderful things living on and around us.

This unusual elevator doesn’t stop or slow down.

The mirrored section takes the shape of Hebrew characters when viewed from above.

This plaque marks the former home of one of the first women physicians in the Netherlands.

A line number in Amsterdam that will likely never be used again due to its tragic history.

The former headquarters of history's oldest megacorporation.

Amsterdam's narrowest house facade is a monument to 17th-century tax evasion.

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

A poignant museum dedicated to the history of the Dutch resistance against Nazi occupation

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

This poignant tribute to the White Rose movement showcases artifacts related to the heroic anti-Nazi struggle.

The scars of World War II are preserved on its walls.

An abandoned train station in Munich constructed for the 1972 Olympic games.

This century-old cinema house has a marquee that has been hand painted by a single man for over 25 years.

Go surfing on this urban wave, "hacked" by local surfers.

A subterranean display of public art and architecture.

One of the most easily accessible examples of the rare 1960s UFO houses.

These bronze pamphlets remember a remarkable group of Germans who fearlessly opposed the Nazis in the very center of their power.

Golden cobblestones remember a time when this small alley was used to avoid having to give a Nazi salute.

A fantastical 13th-century fortification sandwiched by a modern hotel in central Brussels.

Medical history with an amazing, if frighting, collection of wax diseases on display.

This recently restored crypt was once plagued by liquefying coffins and exploding caskets.