The most visited, and possibly most controversial, museum in Germany.

Life in this isolated, hilltop lighthouse was lonely, but it sure was lovely.

A tree grown from astronaut seeds which were exposed to cosmic rays.

One of the most elaborate displays of Jellyfish is on display at the aquarium.

A futuristic-looking beach house built for the owner of a snack food brand.

Built for an exposition in 1915, these horticultural displays have stood the test of time.

An ode to the friendship between four Pacific Rim countries.

One of the largest trees of its kind in California.

A sculpture of the famous photograph stands on San Diego's "Greatest Generation Walk."

L. Frank Baum wrote part of the "Wizard of Oz" series in this wooden Victorian beach resort.

Lucha Libre (Mexican Wrestling) themed taco shop.

An inconspicuous footbridge beloved by San Diego locals.

An extraordinarily ornate museum in San Diego holds wondrous anthropological treasures.

Behind this beachfront shop lies a spectacular, colorful sea cave with an equally colorful past.

These caves secretly held national treasures during World War II.

A Byzantine-era church hidden in a wooded area below the Acropolis.

The ruined doorway is a portal to the building's turbulent and torturous past.

Large collection from the 3rd millennium BCE.

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

A sharp sculpture made of thousands of pieces of jagged glass.

Heralded as the world's first theater, these ruins are often overlooked as they reside in the shadows of the Acropolis.

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

The railway carts travelers to central Athens's highest peak, which offers stunning vistas of the city.

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