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.

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

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

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

Site of a classic 19th-century physics experiment to prove the earth is rotating.

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

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

From failed port town to Civil War fort, the ruins of this former defense saw their finest day in the television age.

A Nessie-like monster supposedly lurks in this lake.

Trace the history of writing at this unusual North Carolina destination.

Formerly the most gerrymandered district in the U.S., it twisted and turned along racial borders.

This nine-story building can be played like an instrument.

The cruel trial of a 13-year-old boy inspired the creation of this now abandoned reformatory.