Synagogue built from the stones of Solomon's temple contains the golem of Prague.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

The first museum in the world devoted to sexual gadgetry.

This simple apartment may have inspired some of the most important theories in the history of science.

The century-old bell and clock tower at UC Berkeley is the third-tallest in the world, and has fossils.

An elaborate gift from Claus Spreckels is now a piece of San Francisco history.

Only hotel where you can legally launder money.

Elevated freight railway turned wildly successful urban park.

Macabre astrological automaton clock dating to the late 1400s.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

Breathtaking and huge 430 year old maps of Italy.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

The largest free-standing aquarium in the world resides in a hotel lobby in Berlin.

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

This massive redwood tree has a hole in the base big enough to drive through.

A trash dump made beautiful by nature's power.

Home to the "Circus" trees created by Axel Erlandson.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

A comprehensive collection of Pez dispensers.

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

Golden Gate Park's historic collection of plants.

Inside an old airplane hangar, friends and strangers alike play on a massive trampoline.

Staircase winds down the side of Telegraph Hill through gardens, wild parrots flying overhead.