This frozen tunnel in central Alaska is both an engineering feat and a valuable climate classroom.

This mile marker stands at the unofficial end of a highway built to defend the United States from a Japanese invasion during World War II.

At this Nashville restaurant, cheese and charcuterie arrive via conveyor belt.

Flaunt your karaoke chops at this pitch-perfect dive bar.

East Nashville's oldest dive bar will bring you back to life with animal-style bar fare.

Sip mead from an East Nashville apiary while snacking on barbacoa tacos.

The alley connecting two of country music’s most historic venues has a rich history of its own.

Victorian-era Egyptomania left its mark on this Nashville landmark.

The 953 windows undoubtedly make this the world's most beautiful screened porch.

This bird-loving brewery is situated in an old municipal bathhouse, nestled beside a 300-year-old windmill.

Some 80,000 Delft Blue tiles line the inside of this Amsterdam walkway.

This historic Amsterdam bar used to accept sailor's monkeys as payment.

This restored Portuguese cafe may well be the most beautiful place in the world to grab a Big Mac.

One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.

Elaborate tile work in this railway station tells the story of Portugal.

One of the world’s longest pedestrian suspension bridges.

Houses are tucked between, on, and underneath giant boulders.

This gaping hole in the middle of a remote mountain lake looks like a portal to another dimension.

One of the smallest bookstores on the planet.

Ring the bell to enter a bar that looks equal parts museum and old curiosity shop.

The sumptuous ceiling was one of the last things Charles I saw before his execution.

This long-hidden space above Westminster Abbey now displays the battle gear of the legendary King Henry V.

A historic London pub with prison cells in the cellar and a "spy room" on the second floor.

A thousand year old oak tree survives in Liverpool.