This downtown Dallas art installation is always on the lookout.

This sound-art installation features songs composed using only the Mid-Hudson Bridge as an instrument.

A 98-room castle in the middle of Toronto that bankrupted a 19th century electricity multimillionaire.

Read a book next to a Midtown waterfall.

The colonial city's social history is reflected in its fanciful door knockers.

This free sculpture garden is home to over 90 artworks and installations from artists around the world.

Iceland's tribute to its thankless civil servants.

Hidden for more than a century, the grave of the Conquistador remains forgotten behind these church walls.

There’s a hidden military meme engraved on the World War II Memorial.

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

The longest non-mortared wall in the country is one man's tribute to his displaced Yuchi ancestor's five-year journey to her homeland.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

This 19th-century clock has been restored to help withstand the harsh environment of its seaside home.

The largest earthwork effigy in the world.

Natural catch-basin rocks covered in thousands of drawings spanning many millennia.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

This roadside attraction has been serving out its fair share of hearty folklore and chaos since 1858.

A Florida college boasts the world's largest single-site collection of structures designed by Frank Lloyd Wright.

Two mammoth statues inspired by equally tall tales lure tourists to this roadside attraction.

A park that allows you to get up close and personal with one of the world's largest open volcanic craters.

A bronze statue of the famed Prussian naturalist commemorates the year he spent in Mexico.

Former sea turtle kraals, slaughterhouse, and cannery turned museum.

A subterranean house of worship carved right out of the bedrock.

The now-serene site of the largest earthquake ever recorded in North America.