By Lyndsey Matthews
April 15, 2011

This geometric structure was built for a World Expo. Do you know where this is?

Log in and leave your guesses below and be sure to check back on Monday for the correct answer.

UPDATE 4/18/11: T+L community members AAO, silviasantoyo, and MarcoNorth all guessed correctly—this is a photo of the Oriente Station in Lisbon, Portugal. Architect Santiago Calatrava designed this structure, which houses a train station, a subway station, and a bus terminal, to accommodate the influx of visitors to the city during the 1998 World Expo. It is located in the Parque das Nações, the site of the Expo.

Lyndsey Matthews is an online editorial assistant at Travel + Leisure.

Photo courtesy of Travel + Leisure's Photography Contest