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

When this 18th-century observatory's meridian was moved, it set Sweden's time back by 0.04 seconds.

Hidden in plain sight, Sweden's official ordnance datum is now abandoned.

This grisly exhibit houses skeletons and weapons from a devastating 14th-century clash.

An 11th-century runestone decorates the halls of Terminal 2 of this Scandinavian travel hub.

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.

A man has revenged his true love's betrayal through tears and stone genitalia.

An ancient Viking runestone hidden in plain view in Stockholm's old town.

A temporary art piece to celebrate LGBTQ Pride is now a permanent part of Stockholm's traffic landscape.

It appears as if a man is standing behind this giant airport clock, painting the hands in real time.

This 400-year-old tree is actually an immigrant from North America.

The heaviest gold coin ever minted.

A short distance from the Eiffel Tower is the final resting place of several of the city’s more well-known and interesting characters.

Museum on French naval history, with magnificent figureheads, a historic diving suit, and a boat used by Napoleon.

A glamorous hotel that once accommodated French resistance fighters and concentration camp survivors.

The oldest continuously operating mint in the world that has been making coins since the 9th-century.

A beautiful Victorian statue shows France's enduring love of the rhinoceros.

This emotive sculpture was originally created for the 1878 World's Fair.

Walk upon the mementos of the dead in this Parisian courtyard paved with medieval tombstones.

This demon atop the Notre-Dame de Paris looks utterly bored.

A grotto-like lodge decorated with gilded mosaics, rocks and a noisy waterfall was the setting for the most sumptuous pleasure house of 1900s Europe.

In the best of all possible worlds, everyone will get a chance to see this statue in which Voltaire's heart is interred.

This massive library holds what was once the largest book collection in the world.