An encyclopedic collection of mammal penises.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

Medicinal spa created with the discharge from a geothermal energy plant.

This spectacular public market has got meat, fish, vegetables, baked goods, and enough kielbasa for a lifetime.

The only royal palace on U.S. soil has been a territorial capitol, a military headquarters, and a prison for a queen.

Meet manatees face-to-face at this zoo for native species.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

The site of the famous Nazi book burning campaign of 1933 remembers its "Night of Shame".

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

The most visited, and possibly most controversial, museum in Germany.

A slice of central Asia in the middle of Berlin.

Something's watching you.

A 90-acre park on former landfill that hosts an annual kite festival.

The old Niles Canyon Aqueduct in the San Francisco Bay Area is a bemusing and secret trail through nature for wayward travelers.

The oldest building in the District of Columbia was preserved because of a mistaken connection to George Washington.

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

Odd stone and concrete monuments in the "Poet of the Sierras" eclectic folly garden.

A massive ultra-modern church presents a science-fiction view of Catholicism's inclusive future.

This Oakland fairytale kingdom, fiercely devoted to childlike whimsy, was an early inspiration for Disneyland.

A working steam clock, one of only a few in the world, located in Vancouver's Victorian Gastown.

Baltimore's classic clock tower was once topped by a rotating, 20-ton medicine bottle.

A monumental statue of RCA's mascot now sits atop a historical society roof after a life of moving around.