Places polynteli Wants to Go

A canopy trail with sweeping views and a giant tunnel slide.

Opulent period costumes and murals lead you on a journey through fashion history.

The great Danube river starts here.

Horrifically creative torture devices and shame punishments line the walls of this chilling museum.

A castle from the Holy Roman Empire that hosts traveling youth... in its stables.

This museum tells the story of lake dwellers from 4000 BC to 850 BC, replete with stilt houses and goats.

Remnants of an exploded schooner and wrecked submarines form a breakwater.

An elevator into the Baltic Sea.

A striking 12th-century-style castle built on the edge of a cliff.

Ruins of a German castle on top of a towering stone pillar.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

The unique design of this former quarry provides ideal acoustics for concerts.

The 19th-century home of Count and Countess von Hallwyl is now a museum.

A rare surviving Victorian greenhouse designed specifically to house giant water lilies.

An illuminated manuscript comprising the life's work of a lone monk, inexplicably decorated with a portrait of Satan himself.

The largest underground lake in Europe.

Over 3km of caverns and caves at the Switzerland-France border contain the largest underground river in Central Europe.

Extensive private collection of authentic Medieval devices used for human torture and execution.

One of the oldest student jails in Germany.

Amsterdam's former hotspot for public executions and dissections.

The attic of a four-century-old canal house hides a clandestine church.

An ancient passage filled with stalls selling used books, once frequented by Vincent Van Gogh.

This gorgeous reading room houses the oldest and largest art history library in the Netherlands.

The world's first zoo for microbes collecting the horrible and wonderful things living on and around us.