The exhibition explores the Icelandic city's Viking Age history.

For one day every month Barcelona's Estació de França transforms into a market for model trains.

An eclectic collection of thousands of items owned by the sculptor Frederic Marès.

An Iron Age hillfort rooted in Arthurian legend was made famous by musician Peter Gabriel.

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

One of the most important yet well-hidden museums dedicated to the history of medicine.

These relics of the city's past now exist as a prominent modern feature.

This museum is dedicated to the little known ancient Roman history of Vienna.

A patriotic medieval knight in driven-nail armor raised money for widows and orphans of WWI.

A rooftop restaurant hides in plain sight atop Vienna's Palace of Justice.

The final resting place for the remains of 143 Habsburg royalty.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

A Baroque mansion with ties to legendary magicians and alchemists.

The abandoned "Red Star Train Graveyard" is the final rusting place for precious artifacts of train history.

The true meaning behind this sculpture remains unknown.

This building has survived for more than a century and remains virtually untouched.

Time stands still at this serene burial ground in the center of Budapest.

Legions of Roman soldiers bathed in this ancient spa complex under a Budapest transit station.

This hidden art nouveau gem was designed by an architect in search of a national style.

A two-way chairlift system between Zugliget and the highest point in the city.

A museum in the childhood house of a medical pioneer.

Sitting beneath an unremarkable residential building is a museum devoted to classic Pinball.

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.