You can walk up Thailand’s naturally non-slip waterfall.

A triumphant marble and bronze fountain depicting a 15th-century Hungarian king and his hunting party.

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.

Nikola Tesla's ashes are held in a golden sphere, surrounded by his works.

Destroyed Serbian army headquarters sits half crumbled in a largely revitalized Belgrade.

A pair of connected skyscrapers form this symbolic gateway.

A small memorial to a deadly night in Serbia that shook the world before it was swept under the rug.

Considered an architectural abomination by some, this metal-clad building is known as 'little red riding hood' by locals.

Structure built from the skulls of vanquished foes.

A Red Cross memorial museum at the site of the Niš concentration camp that operated for four eventful years during World War II.

This memorial park stands on the site of one of the largest mass executions of the Second World War.

A sinuous path among steep cliffs creates a stunning sight in southwestern Serbia.

A grand Yugoslav memorial to the group of partisans who fought and died resisting western Serbia’s Nazi occupation.

For over 40 years, this quaint little house has teetered on a rock in the middle of a river.

Backwards hour and minute hands and a timing mechanism that fluctuates with the temperature led to this clock tower's local nickname.

Religious perseverance and cultural coexistence manifest in an architectural gem that multiple wars couldn't topple.

This dazzling Art Nouveau mansion is now home to the Modern Art Gallery Subotica.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

Housed in a 1912 architectural masterpiece, this outlet of the Golden Arches is a real beauty.

Through the colossal entrance to this cave you'll find limestone tubs and an underground waterfall.

An idyllic traditional timber village on a picturesque hill was built for a film.

Despite attempts by local police to discourage it, Beatles-inspired graffiti has been a means for artists to air grievances for decades.

Macabre astrological automaton clock dating to the late 1400s.