A curious memento mori hangs in the magnificent Cathedral of Segovia.

The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.

Liechtenstein's royal family calls this medieval alpine castle home.

Genesis of modern hydroelectric power.

Across this single-file rope bridge is what has been claimed to be the edge of continental Asia.

Formerly the most gerrymandered district in the U.S., it twisted and turned along racial borders.

The only quarter of the Old City not dedicated to a major world religion.

The fragmented remains of a massive public bath connected to the city's water supply.

This enormous censer uses a pulley system installed over 400 years ago.

A tunnel that brings more than a century of history to life from the deepest parts of the Niagara Gorge.

Nope, not Washington Irving's house.

Open day and night, a church with three pews and Bibles.

Mining caused an asbestos emergency in this small town.

This fully restored synagogue explores the American Jewish experience along the old frontier.

This Brazilian palace island was once the site of the last grand ball before revolution.

As telephones become more essential and less stylish one historic Brooklyn building remembers the days when they were a grand celebration of communication.

The eccentric home of Estevão Silva da Conceição, known as the "Brazilian Gaudí."

The home of the artist credited with introducing the tomato to the American diet.

This beautiful spit of land was once the summer playground of the king of Spain.

Nearly four centuries after its founding, remnants of one of the oldest planned communities in North America are still visible in southern Brooklyn.

A sarcastic monument threatens to curse any "idiot" who dares remove it.

The word "Watergate" will forever be associated with the infamous scandal in 1972, but this fountain is famous in its own right.

Featuring the the longest lift span of any vertical-lift bridge in the world.

An art museum with an eclectic design and a scandalous past.