Perhaps the most spectacular grotto along the Algarve coastline.

Small Easter eggs are hidden in the ventilation holes of the city's newest trains.

Now home to a drinking establishment, this building has a macabre history.

Home to one of the most popular teams in Scottish football history.

The inverted pyramid design of this station stands out amid Bratislava's urban landscape.

A former special storage facility for documents during the Cold War.

This massive complex is made up of hundreds of smaller temples that date back to the ninth century.

A bronze replica of an elm tree that honors the victims that perished in Pawaik Prison.

A sculpture of graceful storks sits atop this fountain in Independence Square.

Crafted in 1911, this steam locomotive spent its entire working life in Flagstaff.

This bunker in northern France was built by Nazi German forces with the intention of launching up to 50 V2 rockets at London each day.

This colorful and quirky set of pegasus sculptures celebrate the works of poet Zbigniew Herbert.

The "world’s largest honky-tonk" also has its own indoor rodeo arena.

The world's first invisible city square is an homage to a man who pushed the boundaries of art.

This cemetery is dedicated to the people who died fighting for democracy in South Korea.

The world's longest bridge fountain has hundreds of nozzles that create a beautiful, illuminated spectacle.

This small museum once served as a royal hunting pavilion for King Otto Friedrich Ludwig.

This Viking-inspired miniature golf course features a pirate ship and views of Icelandic landscapes.

This site honors an Israeli cargo ship that was destroyed by the government in 1948.

A historic landmark and museum filled with curious objects representing the history of Key West.

Sacred Indian temple that’s all monkey business.

More than half of this Indian palace is drowned but it looks all the more spectacular for it.

The 953 windows undoubtedly make this the world's most beautiful screened porch.

Thousands of exquisitely carved stone water storage wells, hundreds of stone steps fill this exquisite medieval stepwell.