One of Catholicism's four major basilicas has a series of papal portraits that are said to predict the end of the world.

Roman-era ships unearthed...

Brass cobblestones mark the places where individual Holocaust victims were taken from their homes.

Rome's semi-secret peephole vista is also a former Crusader stronghold.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

The only thing better than tubing down New Jersey's scenic Delaware River is doing so while eating a hot dog from a giant floating stand.

Five varieties of trees with custom-designed grates around the trunk are planted along the route of the Seattle Transit Tunnel.

This working class sculpture pounds his hammer all the livelong day.

Leave a button on the jacket of this iconic Seattle clown.

Statue of Lenin, from Cold War era Czechoslovakia, now in a neighborhood of Seattle.

From a neon Rapunzel to a bike traffic meter to a street fair color scheme, the most opened drawbridge in the US is a veritable art gallery.

This Seattle store is packed with all sorts of curious creatures and creations.

This former coal gasification plant found a curious second life as a popular public park.

A wall of chewing gum moonlights as collective art.

A 100-year-old purveyor of curiosities, curios, and kitsch featuring mummies, shrunken heads, and a Fiji Mermaid.

A walk through the historic city center, under the streets of Seattle.

A giant Troll lurks under one of Seattle's oldest bridges.

A museum dedicated to a secret military hospital hidden beneath a castle in Budapest.

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

A museum in the childhood house of a medical pioneer.

Once the home of a hermetic monk, this cave now houses a small church.

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

This Hungarian castle was built out of cardboard and wood until it proved so popular that it got upgraded to stone.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.