Resting in the middle of an Austrian river, this sci-fi "island" lets people cross in neon style.

Austria's ultra-modern art museum looks like Cthulhu's giant alien heart.

A random tree outside a Budapest hotel has become a DIY shrine to the late singer.

This easily overlooked memorial immortalizes the scars from the 1956 Hungarian Revolution.

Gargoyle head that brings good luck.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

This Budapest bar allows drinkers to leave their mark on the walls, floor, and even ceiling.

Sloth rehabilitation center in the jungle of Costa Rica.

A secret climbing tree hides along the side of a Costa Rican road.

A full-size replica of this well-preserved temple lets you take a walk through the Mayan age.

This staircase full of Mayan hieroglyphics is perhaps the largest single text in the world.

This strange sculpture of a menacing skull surrounded by sun rays was discovered at the foot of the Pyramid of the Sun.

On a cornerstone of the City Museum is the head of a monstrous serpent stolen from an Aztec pyramid 400 years ago.

One of the world’s most colorful cemeteries, where each pigment is symbolic.

Central America's deepest lake is actually a volcanic caldera, surrounded by three volcanoes.

Guatemalan womanizer, venerated during Holy Week.

At least seven hues of blue and turquoise make this freshwater lagoon unique.

This portion of a lovely Belize beach is infested with (harmless) sharks and rays.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

Every equinox this Maya pyramid puts on a spooky ancient light show.

Clap your hands at the base of the pyramid, and the song of a sacred Mayan bird will echo through the air.

Iconic red and white plaques show the creative names invented to navigate the city streets.

These sacred Mesoamerican ruins feature peculiar petroglyphs hidden in the stones.