A rebuilt Roman city that was once the largest Roman settlement in the region.

The resting place for anonymous victims of the Danube's dark waters.

The world’s oldest military museum has remained largely unchanged since the last days of the Austro-Hungarian Empire.

Along the edge of this fountain are 365 smaller fountains that represent the days of the year.

This giant, 83-year-old ship elevator is an engineering feat to behold.

This monumental work of art symbolizes the coming together of a previously divided city.

A six-story, asymmetrical tower filled to the brim with scientific experiments.

A statue of an astronomer gazes at the sky as a tribute to Caroline Herschel.

A century-old shot ball factory tower is open to the public once a year.

This 17th-century "unicorn" was cobbled together from the skull of a rhinoceros, the legs of a mammoth, and the horn of a narwhal.

The architect of this fanciful complex called it an "oasis for humanity and nature in a sea of rational houses."

An abandoned NSA listening post on Berlin's "Devil's Mountain."

A surreal museum of extraordinary industrial objects.

Gardens representing parts of Asia, Europe, and the Mid East are tucked away among the Soviet-style buildings in East Berlin.

This figure was carved in the likeness of a voyeur, so that every time he spied across the street, he would find only himself staring back.

A ring of soy sauce bottle bases decorate an important Singaporean landmark.

A gorgeous gilded tower houses what may be the world's largest collection of gin.

These bronze statues depict the early days of trading in Singapore.

A unique, time-transcending work of art depicting the progress of trade in Singapore.

This statue was a gift to commemorate the Thai monarch's first visit to a foreign land.

The largest pool at its elevation sits on top of one of the most expensive resorts in the world.

Singapore's landscaping project is home to 18 incredible Supertrees.

A giant baby floats in the middle of Singapore’s nature park.

Rainbow shutters decorate this former police station.