The National Park Service’s best-kept secret with views that rival any in D.C.

Earth's tallest volcano is sacred to Native Hawaiians, and home to a dozen world-class observatories.

A priest with no formal artistic training used basic house paint to create gorgeous religious scenes inside this historic church.

A controversial memorial at the place where Captain Cook met his violent end.

A collection of memorabilia from the Beat era in the back of a San Francisco bookstore.

This elaborate towering structure was once famed for its revolutionary height.

Yo, Adrian!

It took 40 years to build this Eden-like garden in Marrakech, later restored by Yves Saint-Laurent.

This vast masterpiece of Moroccan architecture spreads across 20 acres.

A 125-meter long "tribute to the Brazilian people."

Eduardo Kobra’s breathtaking 32,300-square-foot graffiti wall took over Rio’s Olympic Boulevard.

An abandoned Nazi explosives plant founded by the inventor of dynamite is now an underground museum.

An impressive monument to Poland's independence.

This stunning concert hall has become a symbol of Iceland's national recovery.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

Rivers of cattle blood gone, a strange Escheresque building remains, the last of its kind.

The powerful party began with a secret meeting in this shikumen in 1921.

A small gallery and shop dedicated to an ancient style of hand-printed textile.

Macabre astrological automaton clock dating to the late 1400s.

An eerie, existential museum dedicated to the author of "The Metamorphosis."

One of the shortest streets in York has an especially odd name.

Follow the original medieval paths that wind through this intriguing section of the city.

This network of narrow, medieval passages has the most delightful name.

This sculpture marks the spot where one of the greatest Roman rulers was proclaimed emperor.