These light, hollow rolls have been linked to Acadia National Park since the 1890s.

The only castle in North America to ever house European sovereigns.

One of New Zealand’s few castles boasts beautiful gardens, grand architecture, and a history filled with family drama.

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

A downtown park built on top of unclaimed graves.

This spooky statue sits outside a famous Prague theater.

A surreal statue honoring Prague's favorite literary son.

The slender brass strip in Prague's Old Town Square was used to tell time from 1652 to 1918.

The palace window through which Protestant nobles flung two Catholic regents, thus sparking the Thirty Years' War.

A bust of Franz Kafka spins in pieces, reflecting the writer's inner torment.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

Two stunning 17th-century libraries and a cabinet of curiosities.

Neighborhood in Jerusalem is home to the ultra-orthodox haredim.

Descend 2,030 years into the past in an ancient tunnel built to support Jerusalem's most famous wall.

This daunting 1st century fortress was purportedly the site of one of the most dramatic revolts of the Jewish-Roman wars.

The home of the Dead Sea Scrolls is an abstract modernist dream.

The bluer than blue waters in these natural Israeli caves are reached via the world's steepest cable car.

An historic and oft-filmed spot for musclebound iron pumpers on the Pacific coast.

Radioactivity still cause for concern at this urban explorer's paradise.

The tragedy of the Japanese internment camps is remembered here by a stark "Soul Consoling Tower."

The ghostly remains of an accidental sea.

One of only two remaining Victorian-era greenhouses in New York.

The spot in the Mile-High City that's exactly 5,280 feet above sea level (at least for now).

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.