Places poppyoana Wants to Go

A hidden art gallery in an abandoned Warsaw fort.

A 20th-century picture show in 3-D.

A famed data visualizer's personal sculpture garden is a landscape of modern and megalithic wonders.

The ruins of an abandoned 18th-century town that is slowly being reclaimed by the forest.

A tiny memorial for the year the Connecticut River almost destroyed New England.

A religious-themed park filled with folk art to bring biblical stories to life that fell into disrepair and now being restored.

Vienna's underworld of tunnels and subterranean rivers made an iconic appearance in a 1949 Orson Welles film.

This museum promotes informed contraception by documenting its often secret past.

Op-art architecture designed for happiness.

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

The topiary maze at the Habsburg hunting lodge.

Macabre museum devoted to historical Viennese murders.

A small museum filled with over 1,000 clocks, and one particular clock calibrated to run until the year 9999.

The beautiful baroque library of the Hapsburg empire.

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

Possibly the world's largest hourglass only needs to be reset every New Year's Eve.

The romantic garden was the epicenter of the Hungarian art scene in the 1880s.

A mocking tribute to the past and modern leadership of Prague.

A 400-year-old mummified arm dangles from the ceiling of St. James the Greater, serving as a warning to thieves.

The first museum in the world devoted to sexual gadgetry.

Countless grotesque faces stare out from this eerie Prague art wall.

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

A pair of connected skyscrapers form this symbolic gateway.

Moss and stone turn this waterfall into an otherworldly liquid veil.