Twice a day this ancient path disappears with the tides, leaving the Holy Island of Lindisfarne out to sea.

St. Augustine's record-setting narrow street was designed to protect against pirates.

This bug-eyed water wheel uses the power of the Sun to clean up Baltimore Harbor.

The abandoned bathhouse is all that remains of the hot springs considered Florida's original tourist attraction.

Before Nixon, "watergate" meant canals.

Fittingly, America's museum of architecture is itself a magnificently designed old building.

A tiny monument to the unsuccessful attempt by Thomas Jefferson to place the prime meridian in Washington.

A painfully obvious spy house sits right across the street from the Russian Embassy.

A surreal statue honoring Prague's favorite literary son.

Visitors flock to see this church tower's unintended feature: It happens to resemble a giant chicken from multiple points of view.

Legend has it that President Grant’s frequent drinking in the lobby gave rise to the term “lobbyist.”

This mysterious structure by the Washington Monument is a flood barrier designed to protect the White House against rising waters.

A historic ruin just 20 feet away from a busy highway onramp.

The famous abolitionist’s preserved estate is one of Washington's finest monuments to its great Black citizens.

One critic described it as "middle Mussolini, early Ramses, and late Neiman-Marcus." Another called it an architectural "natural disaster."

This seemingly out-of-place gas station by the Watergate hotel was once described as the most expensive gas station in the world.

A sweet symbol marks the place where torturous executions were once carried out.

One of the dwarven trees dates back to 1625 and survived the Hiroshima bombing.

The most accurate timepiece in the world.

A hugely vast Irish landscape of barren rock that stretches for miles.

Five candy-colored villages on the Italian Riviera.

This elaborate towering structure was once famed for its revolutionary height.

Time has stopped at the house where Gandhi died.

A rare chance to get up close and personal with a 13-mile ribbon of ice near downtown Juneau.