Places Ignas Kriukas Wants to Go

This Budapest bar allows drinkers to leave their mark on the walls, floor, and even ceiling.

This hidden art nouveau gem was designed by an architect in search of a national style.

The abandoned "Red Star Train Graveyard" is the final rusting place for precious artifacts of train history.

After 11 years of reconstruction work, Slovakia's finest hilltop chapel complex is finally reopen to the public.

This tower in a small Polish village uses the power of a sacred bell to ward off mischievous weather spirits.

The world's oldest known salt mine.

Two monstrous faces loom over a village in Czechia.

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

Walk through Czech history in Prague's largest graveyard.

Two stunning 17th-century libraries and a cabinet of curiosities.

An ancient system of freshwater caves filled with animal bones, including that of species long-extinct.

The largest cave shaft in the world is home to thousands of birds and popular with BASE jumpers.

These azure waters were thought to lead to the Mayan Underworld.

High atop a Mexican rainforest mountain, this ancient pyramid once drew pilgrims countries away.

One of the last umbrella repair shops in Paris upholds the nostalgic art of umbrella making.

Despite being considered a thoroughly American sport, basketball's oldest surviving playing field is found in the basement of a Paris YMCA.

Stroll through retro Paris while shopping for old postcards and discarded doll heads.

A haunting collection of the vanished and disappearing natural world.

A counter-culture bookstore like no other hides in plain sight in the streets of Paris.

Notorious artist squat renovated into legal studios.

This massive library holds what was once the largest book collection in the world.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

This off-limits room in the National Library of France is home to a system of pneumatic tubes, once used to bring books to readers.

In the best of all possible worlds, everyone will get a chance to see this statue in which Voltaire's heart is interred.