The world's largest wooden structure.

This public square capitalized on a single Eagles reference to bring some life back to an Arizona town.

California's oldest wind harp represents a historic piece of America's Danish history.

Pre-Nazi swastikas adorn the sculpted pachyderms flanking this brewhouse portal.

This historic tower in the California desert promises visitors a "vortex of good vibes".

The bomb-ravaged remains of of a colossal Neptune.

This singular Irish dolmen is more Frank Lloyd Wright than upright stonehenge.

Huge stone depressions which may have acted as an Incan agricultural experiment.

Oldest building in California still in use.

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

The stones of this Incan wall complex fit together so well you couldn't fit a piece of paper between some of them.

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

A formerly glacier-tipped volcano that inspired none other than Jules Verne.

Historic medieval fortified city in southwest France.

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

A minotaur, a labyrinth, and a dubious restoration pull in visitors from around the world.

"the sweltering inhabitants of Charleston and New Orleans, of Madras and Bombay and Calcutta, drink at my well . . . The pure Walden water is mingled with the sacred water of the Ganges."

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

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

An extraordinary final resting place full of oversized art, amazing statues, and dead celebrities.

A giant donut stands as a popular symbol of Los Angeles iconography.

A tunnel of hardened lava along Maui’s famous Road to Hana.

An ancient Egyptian temple in the middle of Madrid, Spain.

The 340-year-old house that inspired the classic Nathaniel Hawthorne novel.