A 30-year-old Sycamore tree grown from a seed taken to the moon and back.

The building is topped by a Statue of Liberty statue whose torch has stayed burning since the museum opened.

The body of one of the world's most famous outlaws is covered in cement and iron to prevent it from being stolen.

This multisensory alley has the ability to remind bustling citygoers to stop and smell the roses.

There aren't too many operational funiculars around, but Pittsburgh has two!

The only way to see Pittsburgh is from the top of this lookout point, just like the ancient members of the native peoples did.

The beautiful, ornate weather station is the most popular geocache in Salzburg.

Ugly 18th-century dwarf statues living in a perfectly landscaped Austrian garden.

A fearsome dragon clings to a corner of Munich's city hall.

This massive statue is the personification of Bavaria and the first colossal statue of the modern period composed of bronze.

This statue pays tribute to the iconic musician in the place where he recorded his final studio album.

Lucerne's central prison was converted into a tourist hotel with a bare minimum of changes.

A memorial for a young woman and her ghost, which are claimed to have caused countless deathly shipwrecks.

Thousands of tourists and residents in Cologne affix "love padlocks" on the Hohenzollernbrücke Bridge to symbolize their affections.

Three connected pink triangles memorialize persecuted gays and lesbians throughout history.

Amsterdam's former hotspot for public executions and dissections.

Stay overnight in the world's most sleekly designed rabbit hole, free of charge.

Nature and art meet in this curvy creation

This stately clubhouse has showcased German-American culture for over a century.

A 2,000-year-old computer demonstrates remarkable engineering and astronomical precision.

Where commuters walk through remnants of an ancient Greek necropolis.

The only surviving choragic monument is a trophy awarded in 334 BC for the winning dramatic chorus.

The Cycladic architecture makes this Athens neighborhood feel like an island paradise hidden in the shadow of the Acropolis.

Legend says this sacred tree was a gift from goddess Athena.