Strange physical sensations and optical contradictions keep visitors coming back for more.

The 80-foot tire that looms over Michigan's I-94 was once a Ferris wheel in the New York World Fair.

Island where motor vehicles are banned -- home to the only carless highway in the United States.

This lighthouse and shipwreck museum keep a torch burning for the memory of the SS Edmund Fitzgerald.

These dramatic cola-colored falls have appeared in a poem by Henry Wadsworth Longfellow and a song by Sufjan Stevens.

The fifth-longest suspension bridge the world, connecting one Michigan peninsula to another.

Locals place their offerings on this nightmarish gnarled tree so the witches won't summon another storm.

This ancient Irish tower could easily have stood in for Rapunzel's prison.

These engineering masterpieces are a dominant feature of the Belfast skyline.

This massive monument has been telling the time for 150 years—at a slight angle.

These murals stand as reminders to the troubled history of this Northern Ireland city.

A museum marks and documents the site of the Titanic's launch.

This short bridge is the only thing connecting a tiny Irish island to the mainland.

Northern Ireland's Brobdingnagian stepping stones.

This museum is dedicated to the most famous Irish writers in history.

One of Ireland's most infamous prisons for rebels including men, women and children.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

Coast along one of Japan’s mountain railways for coveted views of magnificent hydrangeas.

Legend holds eating just one of these black eggs can add seven years to one's life.

This Japanese national treasure was originally built in 593.

Peace Park and the Atomic Bomb Dome.

This traditional Japanese shrine is dedicated to four Shinto deities.

This small Japanese street is lined with figures, sculptures and a shrine dedicated to frogs.

This historic castle is one of the oldest and most impressive in all of Japan.