Travel deep inside of Europe's second largest glacier in the world's largest man-made ice cave.

This natural Icelandic fissure allows divers to swim right between two volatile tectonic plates.

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 from the mineral-rich runoff of a geothermal power plant

The most famous location in China was home to whole dynasties worth of imperial rulers.

Pilgrimage site for star-crossed lovers.

This modest plaza in Moneygall, Ireland has cashed in on its distant connection to the U.S. president.

105-foot wide giant metallic flower blooms anew every day in the heart of Buenos Aires.

A tower devoted to — and modeled after — the Divine Comedy.

A bright little alley in La Boca is a part of tango history.

Buenos Aires' city of the dead contains some very famous remains, including Eva Perón.

This historic, palatial theater is now one of the world’s most beautiful bookstores.

The tech giant built three enormous glass orbs in Seattle so employees could work inside a rainforest greenhouse.

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

This "life-size" depiction of Mickey Mouse as a half-lobster is both whimsical and a bit creepy, standing guard over the Boston waterfront.

A unique music museum housed in a historic Boston theater.

The history of the tea trade is told in bas-relief on this historic pair of Boston doors.

On a former island, this old fortification once used to protect the Boston Area and started Edgar Allan Poe in his military career.

The factory for the popular Dumbo location, the Greenpoint shop is a quiet gem.

The façade of this building looks like a bingo board, but it's really a giant clock by a famed graphic designer.

This outdoor gallery of sculptures along the East River was once a landfill.

Once a ferry dock, radio transmitter, and now a new Greenpoint park.