The winding route passes through an enclosed alleyway, two tunnels, and leads to the White House basement.

An ancient holy well said to be used by the patron saint of sailors and travelers, lost in the boggy west of Valentia Island.

A cluster of granite granaries perched on stilts.

A muscular Art Deco monument represents the struggle between regulators and unbridled markets.

This unique crypt designed by Frank Lloyd Wright for his longtime friend was not completed in either man's lifetime.

The underground sanctuary of a mysterious ancient Roman religious cult contains an exquisite traditional fresco.

Joe Cocker's 1988 concert at this site in East Germany marked a changing sea tide that would eventually lead to reunification.

This cobblestoned medieval-style town was entirely constructed in the 1990s and 2000s.

The 2,000-year-old Roman columns are hidden within Barcelona's Gothic Quarter.

A friendly monster lurks outside the State Library Victoria.

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

A stunning two-story timepiece within a medieval Brick Gothic church.

Unusual finds in this shrine to local law enforcement include a 19th-century vampire-slaying kit.

A well-restored ancient archaeology site gives a real feel for life during the Roman age.

A "Titanic" superfan changed his name to Jack and set up this strange shrine to the blockbuster, complete with Korean food and Tarot readings.

The excellent acoustics of this natural amphitheater made it a popular preaching spot for the founder of the Methodist Church.

The illuminating collection of L.A. street lights is run by the city and only opens one day per month.

Home to part of the world’s largest private collection of original manuscripts and documents.

This long-distance walking route follows the Prime Meridian line as it passes through England.

The controversial urban planner who designed Washington, D.C., was buried in Maryland, and can presently be found in Virginia.

The hotel room where Janis Joplin tragically died has now become a makeshift shrine to the singer.