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

This beautiful, historic church looks like something out of a simpler past.

The picturesque birthplace of Icelandic democracy is drenched in the blood of its brutal past.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

Medicinal spa created from the mineral-rich runoff of a geothermal power plant

Experience a charming 1930s version of "infotainment."

This old residential building was once the largest flour mill in the world.

The only arched bridge made of stone on the entire Mississippi River.

A relic of FDR's brief foray into utopian urban planning.

A lawn full of retired spacecraft on display at one of NASA's first research labs.

FDR's Art Deco hospital tower was hopelessly inefficient.

A benevolent, 16-foot-tall river dragon lives on a suburban lawn.

Giant acorn-shaped 19th century gazebo from which suburban Washingtonians gazed upon the original "silver" spring.

A tribute to the beloved, kind-hearted "homeless mayor" of Silver Spring.

Live data is transmitted from the Atlantic coast to instantly recreate the ocean waves in this fountain at the NOAA headquarters.

A girls' boarding school inspired by the Chicago World's Fair, once abandoned, now restored to strange and scenic glory.

The tallest The Church of Jesus Christ of Latter-day Saints temple in the world soars above the Beltway.

The longest escalator in the Western Hemisphere takes over three minutes to ride down.

A swimming hole in the historic industrial quarry that supplied the marble for the Baltimore Washington Monument.

This English-inspired Maryland garden is home to acres of opulent plant life including bushes shaped into an entire fox hunt.

This Delaware River bridge is emblazoned with a catty slogan from a more prosperous time.

A daily replay of the experiment that proved the rotation of the Earth.

Yo, Adrian!

This historic old movie house was the scene of one of the Blob's most iconic attacks.