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

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

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

Since the 1700s, this old barrel has acted as a post box that relies on the kindness of travelers.

Home of the "true" equator.

An elaborate shrine dedicated to the four corners of the world unfortunately misses its mark.

Ordinary art transforms to extraordinary thanks to locals' quirky sense of humor.

Former hunting lodge of a duke who was an avid collector of impressionist works.

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 statue was given to France by the United States to commemorate the centennial of the French Revolution.

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

Medieval museum built over Roman baths that features famous tapestries of a lady and a unicorn.

A museum on the history of Paris, including a set of Napoleon's toiletries, Proust's room, and relics of the Revolution.

A scandalous Art Nouveau collaboration that set Paris all atwitter at the turn of the 20th century.

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

The oldest stone house in Paris was built by its most famous alchemist.

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

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

A posh members-only club with a literally dramatic history.

The notorious headquarters of a corrupt political machine.

The site of the deadly Triangle Shirtwaist Factory Fire.

The New York hotel where tragic visionary Nikola Tesla spent his final hours, destitute and alone but for the pigeons.