L. Frank Baum wrote part of the "Wizard of Oz" series in this wooden Victorian beach resort.

An extraordinarily ornate museum in San Diego holds wondrous anthropological treasures.

The classic Atari game's iconic aliens have invaded downtown San Diego.

Two hundred tons of pioneer artifacts were painstakingly recovered from a shipwreck at the bottom of the Missouri River.

The "World's Largest Underground Business Complex," a 55,000,000-square-foot city underneath Missouri.

Community bookshelf of 25-foot-tall book spines.

An eccentric garden of sculptures crafted in India decorate an Irish green space dedicated to Alan Turing.

The ancient tomb acts as a calendar that keeps perfect time.

This Irish show cave is said to have been the site of a Viking massacre that claimed 1,000 lives.

An Irish church where an 800-year-old mummy is reaching out of his coffin as if to shake hands.

A tiny microvalley etched into the side of Knocknarea Mountain hides another world.

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

This house renovated by Frank Lloyd Wright was the centerpiece of a lavish 20th-century estate.

This pebble beach is so beautiful that taking its rocks is against the law.

Statue dedicated to the star of an old television show.

Six tiny houses built for working class people form the largest intentional cluster of Wright homes anywhere.

A forgotten Cold War relic hidden in the outskirts of a Wisconsin city.

A metal ring in the middle of the road marks the exact spot where the Soviet satellite crash-landed in 1962.

A lovely hidden waterfall right off the highway is well worth a stop.

Almost half-way between the Equator and North Pole.

Terraced flowerbeds and rock sculptures in the midst of the Minnesota wilderness.

Hidden away in the city of Madison, Wisconsin is a nearly forgotten home that Frank Lloyd Wright built for a childhood friend.

This forgotten beach house built to look like a Frank Lloyd Wright masterpiece overlooks a hidden beach.

The only Frank Lloyd Wright-designed structure in the architect's hometown.