Three columns of volcanic rock shoot out of the ocean.

This tiny museum's sizable collection is jammed into a former underground public toilet.

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

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.

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

A roadway designed for a visiting monarch.

A pair of mosaics marks the spot where the last accused witch of Dundee was put to death.

People leave coins atop an unusual grave marker in one of Scotland's oldest burial grounds.

The former home of a mad diplomat is said to still be marked in bloody, arcane scrawls.

A beautifully eclectic mix of architectural styles.

One of Amsterdam's narrowest houses is located right across the canal from its widest.

Amsterdam's narrowest house facade is a monument to 17th-century tax evasion.

Famed for its pie, this eatery has a hidden tunnel that allowed Catholics to secretly walk to church during the Reformation.

Seven mini rowhouses fill the gap between 54 and 70 Westerstraat.

The last of Amsterdam's original sea level markers remaining in place.

Colorful and chaotic stacked hotel in North Holland.

A Milanese café entirely designed by the American director Wes Anderson.

A majestic hotel for dreamers rises from the center of a fairytale wood.

The "Little Ones," show Portugal in full miniature splendor.

A 16th century chapel decorated with bones, skulls, and entire bodies hanging from the wall.

The medieval castle built as headquarters for the Pope's secretive Knights Templar.

The corpse bride of Portugal.

A fortress off the West coast of Portugal that dates back to 1502.