Vienna's giant wonder wheel had a starring role in one of the greatest noir movies of all time.

Taking the subway here means doing so over a bridge located in the middle of an estuary.

A marvel of Byzantine engineering under the streets of Istanbul.

Sofia's legislative center is continuously reinventing itself.

In this recreational park, two artificial lakes share a surprising connection to Wembley Stadium.

The Swedish flag over this small naval fort signals that the nation is at peace.

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

The world's largest model of our planetary system.

This hole formed by a glacier is the largest and best-preserved of its kind in Stockholm.

This giant crucifix is like U2's Joshua Tree for Swedish death metal fans.

The site of Stockholm's last public execution.

Part of an abandoned19th-century fortress hides in plain sight inside a modern office building.

It was meant to help transport wounded soldiers to a secret underground hospital.

An abstract representation of weather in Sweden.

A miniature model of the iconic Stockholm department store.

Maybe the only restaurant in the world where your seat will be signed by a Nobel laureate.

This small museum nestled inside a souvenir shop is dedicated to Sweden's most well-known toy.

These airport hangars are now a bustling shopping center with only hints of its past still lingering.

The center of Stockholm can be found along this quiet street.

This Stockholm light tower can be controlled by anyone with a smartphone.

There are hidden patterns on the subway seats of some Stockholm metro cars.

No one knows who's responsible for decorating this tunnel with stuffed animals, but the people love it enough to protest their removal.

A former suicide bridge is now accumulating symbols of love instead of a body count.