The enchanting archway is the only surviving portal into Dublin's lost medieval wall.

A guitar mounted on a wall in Temple Bar honors the Irish musician.

A huge wooden clock that is so beautiful its creator was forcibly blinded.

The hidden lair of an alchemist rediscovered in a 2002 flood.

The slender brass strip in Prague's Old Town Square was used to tell time from 1652 to 1918.

Macabre astrological automaton clock dating to the late 1400s.

This bustling Italian plaza is built on the ruins of an ancient Roman amphitheater.

Fortified medieval tower house with lovely roof garden.

A Bronze age settlement on the Greek island of Santorini might have been the inspiration for Plato's Atlantis.

The picturesque birthplace of Icelandic democracy is drenched in the blood of its brutal past.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

One of the oldest family businesses in Reykjavík serves lamb-based hot dogs.

The first woman to become a member of the parliament of Iceland.

Medicinal spa created with the discharge from a geothermal energy plant.

Now housed in a museum, this giant pink elephant stood in downtown Seattle for more than 60 years.

This Seattle curio shop collects and sells haunted items in order to spread wonder one grim artifact at a time.

This theater opened in 1998, but both the building and the puppeteers who perform there have a distinguished history.

In the back of a nondescript sports bar is a museum-worthy mural by legendary cartoonists.

Cave carved out of a huge snow drift collapsed killing one and injuring five in July 2015.

The tiny church offers succor to travelers driving by, but only eight at a time.

This long, dark tunnel is open to hikers, but those without lights are known to get confused even on the straight path.

An abandoned network of military bunkers and tunnels open for anyone willing to descend into the darkness.

A historic hotel with many stories of haunted activity.

The longest spit in the United States ends at a lighthouse in the Strait of Juan de Fuca.