One of Serbia's oldest luxury hotels and a nostalgic echo to Yugoslavia in the state's former capital.

This memorial to a murdered empress took 20 years to design, then spent 30 years hidden away in storage.

The true meaning behind this sculpture remains unknown.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

Late at night, the bust of the "Dracula" actor was snuck onto the facade of this Budapest castle.

This Hungarian castle was built out of cardboard and wood until it proved so popular that it got upgraded to stone.

A highly-criticized monument in Budapest has become the site of a makeshift Holocaust memorial.

A much-loved sculpture depicting the hero of a 1956 anti-Soviet uprising.

This quiet, unassuming spot in Budapest was the birthplace of the bloody 1956 Hungarian Revolution.

A random tree outside a Budapest hotel has become a DIY shrine to the late singer.

Inside this Krakow church, an explosion of psychedelic color.

Krakow's own version of the Hollywood Walk of Fame.

An underground city of salt.

Tiny communists hammer away on the Olomouc Astronomical Clock.

An ornate plague column – built to celebrate life – claimed the lives of numerous artisans during its construction.

This strange statue depicts a young boy's body with an adult Mozart's head and a single wing.

This hanging crocodile is thought to be the "dragon" that once plagued a Czech city.

A peculiar clock commemorates a historic victory won by ringing the noonday bell an hour early.

Europe's second largest ossuary wasn't discovered until 2001.

The statue of a legendary giant who carried Christ and shouldered the world's sins.

The former Field Marshall and Minister of War to the Russian Imperial Army.

A statue built to honor the elite soldiers who fought for Latvia during World War I.

With a design inspired by traditional Latvian textiles, this monument honors the Latvian people who suffered under Soviet occupation.

A stone marker and sculpture in the city of Riga stake a claim for the very first community Christmas tree.