Originally conceived as part of a proposed Arizona State Capitol building in the 1950s, this structure built in 2004 stands as a monument to the architect's legacy.

The highest natural point in New York City and all of the Atlantic coastal plain.

On the wall of this medieval walkway, a symbol of the Spanish Inquisition.

Preserved behind glass, the ruins of a medieval building used to store human remains.

To commemorate a century of gold mining, this Australian city built a monument that features a replica of a 150-pound gold nugget found there in 1858.

Now owned by the National Park Service, this location was once home to illegal boxing matches.

In Cold Spring, New York, a shrine containing Godzilla and an assortment of plastic dinosaurs stands dedicated to a teenager who died in a car accident in 1996.

This fancifully decorated Victorian home in New York’s Hudson Valley is the only known fully domed octagonal residence in the United States.

An artist crafted this lonely left hand as an imagined relic from Singapore's history.

An authentic, seaworthy replica of the ship that sailed to Newfoundland in 1497.

Step into a pastel time capsule where candy is truly dandy.

One of Antoni Gaudí’s earliest buildings, built between 1886 and 1890 for the industrialist Eusebi Güell.

In the power of this waterfall, Alexander Hamilton saw the potential for industry.

Hidden behind a gate in Greenwich Village is a little farmhouse that once served as the writing studio of a bestselling author.

Home to first responders to Greenpoint's devastating oil fires.

Nondescript building owned by ExxonMobil working on siphoning Greenpoint Oil Spill out of the ground.

A tribute to the pop culture icon overlooks this Washington D.C. intersection.

This elaborate tunnel is the first structure composed of cast concrete in the United States.

A 13th-century fortified manor house that was once sieged during the English Civil War.

A beautiful, historic location open to the public.

This 6th-century church honors St. Tudno, the patron saint of Llandudno.

The façade of this building looks like a bingo board, but it's really a giant clock by a famed graphic designer.

Beautiful views of the surrounding hills and birds of prey can be found at this sanctuary.

This Roman arena once played host to bloody gladiatorial battles.