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

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

Rising from the sea like a stone monster.

The most powerful waterfall in all of Europe.

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

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

Three columns of volcanic rock shoot out of the ocean.

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

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

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

This bridge was constructed from the rubble of the infamous Bastille.

This life-size replica of the Statue of Liberty's flame is also a tribute to Princess Diana by default.

This former “ante-chamber to the guillotine” has been refurbished to illustrate the brutal history of French justice.

A favorite Paris bar for U.S. expats, including Gershwin, Hemingway, and James Bond.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

The very center of Paris is surrounded by a bevy of strange good luck rituals.

19th century pendulum and a clock restored by a rogue group of guerilla artists.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

This large midwestern cavern features impressive rock formations and an underground waterfall.

A whimsical sensor instrument for Minneapolitans to play on their walks to work.

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

Civil War-era Fort designed to withstand invasion and attack, with tricky traps called "murder holes."

Civil War Fort on an island in the Boston Harbor.