Stockholm's tiniest statue is of a small boy looking at the Moon.

It is said that each of the white stones in the red facade of this medieval house represents the head of a murdered Swedish noble.

An ancient Viking runestone hidden in plain view in Stockholm's old town.

It houses the remains of a 17th-century version of the Titanic.

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

Visitors are treated to a stained glass kaleidoscope interior inside this work of art.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

The location of this small park was once the site of an infamous public morgue.

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

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

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

Notorious artist squat renovated into legal studios.

The yawning maw of this pagan visage is said to bite off the hands of liars.

Now a hotel, this former bank was the site of a robbery that spawned a psychological phenomenon.

A wall of chewing gum moonlights as collective art.

The spot in the Mile-High City that's exactly 5,280 feet above sea level (at least for now).

A technicolor place of worship for Elevationists.

The oldest operational cathedral in the U.S. has one shell of a way of projecting speakers' voices.

A 200-year-old bar in the historic French Quarter refuses to give up its place in history, nor its role in securing ours.

This rock in the middle of a river in Jayuya contains dozens of Pre-Columbian Taíno petroglyphs.

This beachside town is home to a diverse nature reserve, multiple cays, and one of the three bioluminescent bays in Puerto Rico.

Puerto Rico's oldest rum producer started its 140-year-old business with "a little barrel."

A magnificent waterfall nestled in the heart of the El Yunque National Forest.

This niche museum devoted to ancient religious artifacts is shaped like the very thing it displays.