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

This black sand beach was crafted from volcanic explosions including the historic Minoan eruption.

A Byzantine-era church hidden in a wooded area below the Acropolis.

An ancient octagonal weather station named for the eight Greek gods of wind.

The Cycladic architecture makes this Athens neighborhood feel like an island paradise hidden in the shadow of the Acropolis.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

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

The bridge's highly-contested plaque (once again) honors Confederate President Jefferson Davis.

The iconic D.C. restaurant where the Cuban Missile Crisis was negotiated, now a Walgreens.

Largest man-made excavation on earth!

Commonly referred to as the most photographed Victorian home in the United States.

The southernmost outpost of the Russian Empire in colonial America.

The fossilized remains of ancient California redwoods.

The haunting ruins of Jack London's dream house.

The only surviving piece of a submarine said to be the most decorated vessel in U.S. history.

A Roman-style column in Oregon hides a spiral staircase inside.

A massive sea stack famous for its appearance in The Goonies.

Two massive rock outcroppings on the Oregon coastline.

This unassuming cheese empire in rural Oregon churns out more than 150,000 pounds of cheese each day.

Two mammoth statues inspired by equally tall tales lure tourists to this roadside attraction.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

Among the ostentatious rococo ornamentation of this church, an image of death cuts the life-thread.

A small but immensely extravagant palace built by the "Night King."

The fairy tale castle of the “fairy-tale king,” this was also the inspiration for Disney’s “Sleeping Beauty.”