The second-largest collection of runic calendar staffs in Sweden.

A rare rune stone dedicated to a woman.

Legend says this fabled well held part of a mythical Norse tree.

The official meeting point for the oddly named governing assembly of ancient Sweden.

This mysterious runestone embedded in a church wall is linked to the medieval cult of Saint Erik.

Ancient burial grounds of the wealthy.

Small Easter eggs are hidden in the ventilation holes of the city's newest trains.

Swedish skyscraper with a 90° twist.

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

This poignant sculpture of a gnarled weapon is a symbol of non-violence.

A king's bloodstained shirt is among the gruesome collection of artifacts displayed below Stockholm's Royal Palace.

Outside a Viking museum sits a modern-day runestone made by a Swedish runemaster using traditional methods.

The discovery of an old wall led to the creation of this fascinating museum about the city in the Middle Ages.

Sweden's "good old days" painstakingly re-created in a model village.

It houses the remains of a 17th-century version of the Titanic.

The bridge's highly-contested plaque (once again) honors Confederate President Jefferson Davis.

While most wind tunnels test scale models, the "Cave of Winds" was large enough for actual airplanes.

Four bald cypress trees in Lafayette Square, across from the White House, mark the southern edge of a 100,000 year old cypress swamp.

Once home to seven different roller coasters, Glen Echo has undergone many transformations since its founding in 1891.

This isn't your average roadway—it's actually a National Park and a transportation pioneer.

The romance of early commercial flight still fills this Art Deco destination.

This seemingly out-of-place gas station by the Watergate hotel was once described as the most expensive gas station in the world.

Washington's iconic carousel has a nice piece of Civil Rights history.

This grand gothic brewery has been pumping out suds for over a hundred years.