On Waikīkī Beach, a monument to four extraordinary individuals of dual male and female spirits who brought the healing arts from Tahiti to Hawai'i.

The world's oldest rose is so tough it survived being bombed in World War II.

A glimpse into the sacrifices of military members during World War II.

This unique sculpture proved invaluable when it saved a train from careening off the tracks.

Hidden in the hills is a mysterious stone structure, known only to a few.

This life-size monument honors the legacy of a famous literary feline.

This medieval castle overlooking the Elzbach river looks just like it did hundreds of years ago.

Nine of the very few concrete ships ever made in the U.S. are beautifully decaying off a Virginia pier.

The land is full of geologic eye candy, such as otherworldly spires, mushroom-shaped hoodoos, and prehistoric fossils.

This Spokane mansion and the stories within its walls have been brought back to life, thanks to careful restoration.

A relief that wraps around the concourse of Los Angeles's World Trade Center marks one of the city's failed urban design plans.

This 29-ton granite ball spins around at the slightest touch thanks to a scientific phenomenon.

Over time, this castle grew to encompass the entire island.

An eatery in a shallow river where diners can enjoy their meal mere feet from the base of an artificial waterfall.

Narrow gorges and deep pools created by long-ago glaciers.

Giant busts of 42 U.S. presidents are sitting in a field in Virginia.

Hidden in an Italian forest is a completely homemade amusement park that has taken a lifetime to create.

Bioluminescence in the reefs of the Maldives causes the sea to glow like a starry night sky.

Perhaps the oldest vine in North America, this sprawling plant helps make a sweet wine.

These pink granite water slides are the result of millions of years of erosion.

A hidden bar inside an ad agency has a deliberately misleading name, so employees can stay late under pretext of paperwork.

Just your average Marie Antoinette–themed speakeasy in an abandoned 19th-century subway tunnel.

This Boeing KC-97 tanker is now a restaurant for aviation lovers.

This grounded passenger jet is now a restaurant, complete with rows of seats and “flight attendant” servers.