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

Walk in the footsteps of the gods and straddle two tectonic plates.

This eye-popping Icelandic crater lake is surrounded by red volcanic rock.

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

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

A dark patch of the ceiling at Grand Central Terminal which was not restored is still stained brown by tobacco.

The most confusing clock in New York.

A bit of retro transportation flair preserved in the world's largest department store.

Once the tallest building in the world and the site of "the highest dinner ever held in New York" this building now holds the most expensive penthouse in the city.

Elevated freight railway turned wildly successful urban park.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

This small Bavarian graveyard is filled with empty graves for German soldiers lost during the World Wars.

Dress up like a miner and take a slide into the disco-lit depths of this once foundational salt mine.

"The Donut" was built as part of an expensive, ill-fated engineering endeavor.

Soaring over 6,000 feet in the Bavarian Alps, this beer garden was once Hitler's 50th birthday present.

This centuries-old canal known as the Cuckoo Dyke has a staircase of locks suitable for a giant.

A blunder resulted in these charming stone-lined streams becoming the target of a Nazi bombing.

An enigmatic natural rock formation with a manmade passage cut through the center.

The atmospheric road was never meant to be so creepy.

After nearly 60 years, there's still a bear at Paddington Station looking for help.

The largest stone circle in the world has ended up bringing up more questions than it has answered.

This picturesque view of the Scottish Borders was beloved by Sir Walter Scott.

Twice a day this ancient path disappears with the tides, leaving the Holy Island of Lindisfarne out to sea.

The granddaddy of English geoglyphs dates back to the late Bronze Age.