Clifftop village of Riomaggiore, Cinque Terre, UNESCO World Heritage Site, Liguria, Italy, Europe

Vernazza, Cinque Terre, Liguria, Italy

Vernazza, Cinque Terre, Liguria, Italy

Vernazza, Cinque Terre, Liguria, Italy

Striped catfish, Plotosus lineatus. This species is often found in tight schools feeding on tiny prey in the sand and rubble. Buyat Bay, North Sulawesi, Indonesia, Pacific Ocean.

Common dolphins (delphinus delphis.Common dolphin in a tight group with a baby. Gulf of California.

Children playing in water walkers on Llandudno Pier, North Wales, United Kingdom, Europe

Transient Orca (Orcinus orca) - also called Killer Whales - in tight pod formation in Chatham Strait, Southeast Alaska, USA. Pacific Ocean.

Children playing in water walkers on Llandudno Pier, North Wales, United Kingdom, Europe

Ribbon Sweetlips (Plectorhinchus albovittatus). Location unknown (RR)

Peniscola, Costa Dorada, Spain

Schmalspurbahn Molli, a narrow-gauge railway, driving next to cars, Bad Doberan, Baltic Sea, Mecklenburg-Western Pomerania, Germany, Europe

Mountain river Soca flows through narrow canyon, Soca Valley, Triglav National Park, Bovec, Slovenia, Europe

Mountain river Soca flows through narrow canyon, Soca Valley, Triglav National Park, Bovec, Slovenia, Europe

Mountain river Soca flows through narrow canyon, Soca Valley, Triglav National Park, Bovec, Slovenia, Europe

Rowing boats are tight together at Phewa Lake, dark thunderstorm clouds are rising at the sky, Pokhara, Kaski District, Nepal, Asia

River Soca flows through narrow canyon, Soca Valley, Triglav National Park, Bovec, Slovenia, Europe

Climbers on their way through the Hoellentalklamm, narrow rock gorge with mountain stream, Wetterstein Mountains, Garmisch-Partenkirchen, Werdenfelser Land, Upper Bavaria, Bavaria, Germany, Europe

Signs on the trekking trail next to the waterfall in Levada do Caldeirao Verde, Queimadas, Madeira

Historic town of Limone sul Garda, Lake Garda, Lombardia, Italy, Europe

View from the summit of the Waxenstein over the rocky and narrow ridge of the Waxenstein ridge to the Eibsee lake and Hoellental, cloudy rocky mountain landscape, Wetterstein Mountains, Garmisch-Partenkirchen, Werdenfelser Land, Upper Bavaria, Bavaria, Germany, Europe

Crevice inside Weano Gorge, Pilbara, Northwest Australia

Moznica gorge, torrent in narrow canyon, Bovec, Soca valley, Triglav National Park, Slovenia, Europe

Ship in canal lock, Telemark, Norway

Motor bus, cars, Trollstigen, Norway

Pedestrian suspension bridge over the Hooker River, Hooker Valley Walk, Mount Cook National Park, South Island, New Zealand

Fondamenta de Ca' Bala' from Ponte de Ca' Bala', Venice, Italy, Europe

Lifestyle, a young brunette caucasian woman with a tight black top sitting on the city river at sunset

Gondolas in Venice, Italy

Canale, Venice, Venetien, Italy, Europe

Alleyway in the historic town, Cervo, Riviera, Liguria, Italy, Europe

Old town lane, Tuebingen, Swabian Alb, Baden-Wuerttemberg, Germany, Europe

Milletseed Butterflyfish (Chaetodon citrinellus) in a tight school off Kauai, Hawaii, during the spring, Kauai, Hawaii, United States of America