Along this wire fence, travelers have been leaving a particular memento since 2012.

Iceland's tribute to its thankless civil servants.

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

This black church sits alone among a field of lava rock.

Three columns of volcanic rock shoot out of the ocean.

The largest whale museum in Europe allows visitors to walk among life-size giants.

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.

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

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

One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.

Thanks to an acoustic anomaly, this unassuming stone bench has heard one hundred years of secrets.

An accidental trick of light casts the perfect shadow of a pilgrim of the Camino de Santiago against the cathedral wall.

This beautiful vintage movie palace has seen little change in form or function since the 1920s.

A gaudy painted elephant stands in memory of south Florida's fallen carnies.

A rotating cast of guys and dolls in front of a Washington, D.C. building.

An eponymous directional signpost erected by the first president of the United States.

Nestled amid the trees lies an abandoned funicular railway that dates back to the 1920s.

A quick trip around the globe through an amazing miniature exhibit.

This subterranean oyster house has been the pearl of Grand Central Station since 1913.

Those belting out show tunes in this West Village piano bar might not realize it marks the site where Thomas Paine died in 1809.

The 28-foot granite map plots the locations of 40 theaters in New York City.

Hundreds of antique bank vault locks on display in New York City.

A very classy 1920s-era bar right in Grand Central Station.