The ruins of the largest gladiatorial school in Rome are largely hidden under modern streets.

Once home to one of the oldest banks in the world, this building is also where Marco Polo's famous travelogue was written.

This cathedral hides a sculpted dog that determines your fate and an unexploded shell from World War II.

Depending on how it is measured, this lighthouse can claim to be the tallest in Europe and the tallest conventional lighthouse in the world.

This floating sculpture of ice is a poignant reminder of nature's power.

This handsomely carved wooden church is more than 800 years old.

The urinal, known by many names and designated as a Norwegian Cultural Heritage Site for its simple and functional design, stands as a testament to old gay history in Norway.

A memorial to 350 people burned at the stake for witchcraft.

A favorite with sightseers and locals alike, this Norwegian funicular provides easy access to a stunning view of Bergen and its environs.

An encyclopedic collection of mammal penises.

This stunning concert hall has become a symbol of Iceland's national recovery.

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

This oceanside Reykjavik spot is speckled with recycled sculptures and large stones.

Instead of solid circles, the stoplights in this northern Icelandic town have glowing red hearts.

This natural rock formation features seemingly unnatural vertical ridges that have been blamed on elves.

A miniature village mimics the surrounding buildings so well it includes itself.

A Lovecraftian altar of nightmarish bronze chairs sits ominously on a boardwalk in Puerto Vallarta.

This bridge over the River Cuale leads to a neighborhood that was once an escape for Hollywood's elite.

This restored opera house is named after a soprano known for tragic romance, exile, and a truly uncomfortable wedding.

From Nunavut to Tierra del Fuego, you won't find any lighthouse higher than this one.

This art shopping center still boasts pieces of its past as a textile factory.

A historic covered bridge, only one of two remaining in North Carolina.

This historic electric train has operated with regularity since the early 1900s.

Spain's stunning solar energy plant.