This massive circular sculpture may not be a portal to other worlds, but it does inspire the mind to imagine them.

A perfectly crafted Pre-Columbian artifact dating back to 600 CE.

Home to more than 13,000 pieces of war memorabilia and military equipment.

Celebrating the history of Hangul, the Korean writing system invented by King Sejong to improve his realm’s literacy.

The best place for scenic views of the DMZ and North Korea.

Secret North Korean passage discovered below the world's most dangerous border.

Dozens of bronze glove sculptures symbolizing loss and life decorate a busy Cambridge subway station

This clock tower is all that remains of Bird Hall, constructed by one of the founding families of this Massachusetts town.

One of the last remaining World War II Victory Gardens in the U.S. is quietly growing across from Fenway Park.

This impressive Boston holy house is the American mecca for Christian scientists.

An enormous, inside-out glass globe built in 1935.

One of the most popular megalithic sites in Ireland stands as a humbler version of Stonehenge.

A journey begins with a single step, and for many, the road-trip of a lifetime started at this Chicago intersection.

Fragments of architectural wonders from around the globe are embedded in the newspaper building's walls.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

These five houses were built for the 1933 Chicago World’s Fair.

An enormous roadside pan tells the story of a battle for pie glory.

Thousands of tourists and residents in Cologne affix "love padlocks" on the Hohenzollernbrücke Bridge to symbolize their affections.

Meet the bronze beloved pet to a family of famous peeing statues.

A little sculpture with a large wardrobe.

Brussels' favorite peeing boy has a sister.

As the highest point in the Mid-Atlantic range this stratovolcano offers spectacular views.

One of few vertical lava tubes in the world accessible by foot.

This abandoned five-star hotel is now a five-star urban exploration destination.