This legendary city has been a tourist attraction for centuries.

A 2,000-year-old computer demonstrates remarkable engineering and astronomical precision.

This famous city eluded concrete detection until the early 2000's.

A stratovolcano located in the south of Iceland, with a long history of charted activity and a rich mythology attached.

A magical, macabre wax museum, beloved by locals, uses real artifacts to depict an assassination from the French Revolution.

Eccentric concrete mansion and museum designed and built by hand from the inside out.

A bronze monument to the infamous radio broadcast in the real New Jersey town where the fictional Martians crash-landed.

The location of the last witch trials of Italy, known as "The Salem of Europe."

An alleyway plaque is all that remains of the independent Texas' envoy that forgot to pay their rent for over a century.

A place of great reverence for Trekkies everywhere, a hero's future birthplace.

The farm where one of America's greatest leaders was raised is now a well-appointed landmark.

The middle finger of modernity.

Italian poet Dante Alighieri is entombed in this small mausoleum in Ravenna, and his hometown of Florence has never been too happy about it.

Museum dedicated to literary greats of the Romantic Period is also the home in which Keats met his untimely end.

An alchemist's "magic door" stands in the middle of a Roman park.

Virgil's many-mouthed gateway to the underworld.

A sulfuric hellscape in southern Italy.

Collection dedicated to funeral rites, equipment, and mourning rituals of the Viennese.

The world's oldest known salt mine.

Soaring over 6,000 feet in the Bavarian Alps, this beer garden was once Hitler's 50th birthday present.

This former Masonic hall has been turned into an art project that uses even more metaphysical iconography.

Every hour on the hour a naked heroine and her leering foil appear from this giant cuckoo clock.

A historic house devoted to the teachings of a 1700's prophetess and her mysterious box of revelations.

An Escher-inspired library dedicated to the wonders of the human mind, yet closed to the public.