Feral cats keeping the rodent population at bay all across Greenpoint waterfront.

Known as the "Forgotten City" it was home to industry, riots, artists, squatters, and to one of the largest single disaster fires in New York City.

Open since 1938, this diner has kept its fountain, malt machine, and all the gum that greasers left beneath its counter.

Come for the bait, stay for the brioche.

This mysterious series of teeny guerrilla installations sheds a whimsical light on street art in Oakland.

Julia Morgan's Moorish-Gothic labyrinth of fountains, trees, natural light and Oakland's notable dead.

Inside this Icelandic greenhouse, geothermal energy keeps tomatoes warm and growing.

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

The oldest (maybe) swimming pool in Iceland is a stunning oasis built into the side of a lush hill.

A trio of hidden hot tubs takes advantage of Iceland's natural geothermal vents.

If a glacial river suddenly diving into a sheer chasm via a dramatic, multi-stage waterfall isn't peak Iceland, it's certainly close.

This valley of hot springs and boiling mud pots is home to the record-holding "Geysir," which originated the English word.

The most powerful waterfall in all of Europe.

This elegant arc of a waterfall marks a religious turning point.

Iceland's "Smoky Valley" is a beautiful river that is shrouded in a constant cover of steam clouds.

Iceland's largest lagoon is home to stunning multi-colored icebergs.

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

Staves, storm-calling, and of course, necropants.

Elaborate tile work in this railway station tells the story of Portugal.

Ancient catacombs form the foundation for this Rococo orgy of a church.

This abandoned five-star hotel is now a five-star urban exploration destination.

This restored Portuguese cafe may well be the most beautiful place in the world to grab a Big Mac.

The stunning interior of this Gothic church is covered in ornate gold details.

An ancient and majestic fortress that played an integral role in Portugal's road to independence.