This frequently-photographed waterfall takes only a short hike to visit.

Graffiti-covered ruins that were once part of a farm owned by a mental hospital.

A little-known subterranean street runs under some of the best-known buildings in Chicago's River North.

This ancient theater, restored in the 20th century, lives on as a venue for dramatic and musical performances.

This Australian beach is composed of tiny shells.

A winged-helmed, sword-brandishing tribute to German Americans.

In terms of history and architecture, this is one of the most remarkable cemeteries in the world.

A graceful natural rock formation stands astride the point where the Gulf of California meets the Pacific Ocean.

Built for television, this statue now serves as an unlikely memorial to a fireman who died on 9/11.

A copy of the Statue of Liberty greets visitors to the birthplace of Auguste Bartholdi.

The remains of what was the most important religious complex in coastal Peru for over a millennium.

A tower built by an emperor for an antelope.

A bathhouse from the second Islamic Caliphate decorated with frescoes of constellations, pleasure gardens, and naked ladies.

A place as enchanting as the journey to reach it is harrowing.

This Soviet-era athletic and recreation facility is the highest ice skating rink in the world.

This architecturally eclectic early-20th century mosque was built as a place of worship for the Islamic followers of a Jewish messiah.

A B&B on a Victorian lighthouse station in San Francisco Bay.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

An FDR-era tuberculosis sanatorium has stood abandoned in the suburbs of the U.S. capital for over 30 years.

The ruins of a bombed medieval village memorialize the destruction of the Spanish Civil War.

Within this beautiful Pittsburgh cemetery, a unique headstone bears witness to one man's eternal love for Jaws.

This weekly market in the remote oasis city of Hotan still has the atmosphere of the old Silk Road.

Southern Ocean waters and glacial forces transform the Antarctic ice into these stunning bridges and caves.

If you’ve ever seen a picture of Machu Picchu, then you’ve seen a picture of Huayna Picchu—you just didn’t realize it.