The world's largest outdoor organ is played weekly by one of just two civic organists in the U.S.

Built for an exposition in 1915, these horticultural displays have stood the test of time.

A sculpture of the famous photograph stands on San Diego's "Greatest Generation Walk."

L. Frank Baum wrote part of the "Wizard of Oz" series in this wooden Victorian beach resort.

Take shelter from Hawai'i's tropical heat under the massive canopy of largest Banyan tree on the island.

A series of waterfalls and pools that flow through the 'Ohe'o Gulch and into the ocean.

A once-glowing grotto at the bottom of Waikapalae Wet Cave.

Submerged lava formations create incredible waterworks.

Once the site of the Hawaiian monarchy, this building was originally designed as a palace.

Race through the maze, get your name on the sign.

This museum of Hawaiian and Polynesian culture is the legacy of the last descendant of the Kamehameha Dynasty.

Climbing this abandoned railway leads to breathtaking vistas of O‘ahu.

The former headquarters of history's oldest megacorporation.

Amsterdam's former hotspot for public executions and dissections.

This museum housed in a former brothel explores the past and present of sex work in Amsterdam.

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

An ancient passage filled with stalls selling used books, once frequented by Vincent Van Gogh.

This hidden rooftop garden in downtown London offers a quiet respite from a bustling city.

A quartet of tiled art pieces adorn the floors of this prestigious art museum.

Once designed as the entrance to Buckingham Palace, this structure was later relocated and stands as a victory arch.

Metal horses galloping through a London fountain provide a link to the city's past.

The world's longest continuously running show has played at this small West End theater since 1974.

The ruins of a 12th-century Cistercian monastery can be found alongside World War II tank traps and pillboxes.

This inn of the court provides a fascinating window into London’s legal and architectural history.