An unconventional memorial to the women burned as witches in Bratislava.

A massive sculpture of an obscure Celtic coin that has become a symbol in Slovakia.

The largest fountain in Bratislava.

A line of disused military bunkers built to defend against Nazi invasion lies hidden on the outskirts of the city.

An Albanian monument to the Communism that nearly crushed the country is now a crumbling wreck.

Arguably Belgrade's only example of pure Art Deco architecture.

A NATO bombing took the lives of 16 civilians in 1999—the ruins remain in the center of Belgrade.

Memorial to the 89 children killed during the NATO bombing of Serbia.

This small bronze pyramid marks the center of Belgrade, but some say it is a Masonic symbol.

This striking, historic hotel has major Wes Anderson movie energy.

A towering spire in the fortress of Kalemegdan honors the victorious armies of Serbia during their struggles against the Ottoman Empire.

This feat of Brutalist architecture is also known as the Three Sisters.

A museum dedicated to the former country.

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

A pair of connected skyscrapers form this symbolic gateway.

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

A tropical paradise just a short trip from the opera house is filled with beautiful winged creatures.

A unique shopping and dining park created from old shipping containers and filled with local businesses.

This Las Vegas casino boasts one of only three spiral escalators in the United States—an engineering wonder.

A surreal, interdimensional shopping center and portal to another universe by Meow Wolf.

Las Vegas's very own 40-foot-tall fire-spewing praying mantis.

Nature has shaped this drainage tunnel into the digestive tract of a mighty beast.

Most-visited and most-photographed slot canyon in the American Southwest.

A sharp bend in a dramatic river canyon cut through red rocks.