Nojpetén was the last Maya stronghold conquered by the Spanish, falling in 1697. Located on an island in Lake Petén Itzá in present-day Guatemala, it was the capital of the Itza Maya kingdom, which had resisted Spanish control for more than a century after the conquest of much of the region.
The Spanish campaign was led by Martín de Ursúa y Arismendi. In February 1697, his forces reached the western shore of Lake Petén Itzá with 235 Spanish soldiers and 120 Indigenous laborers. On March 10, they launched an assault across the lake using a large oared attack boat. Spanish gunfire and the military imbalance forced the Itza defenders to abandon the city.
Nojpetén is sometimes confused with famous Maya archaeological sites such as Tikal, Palenque, or Copán. Those cities were important earlier centers, but none was the final independent Maya capital to fall to Spain. After the conquest, the Spanish destroyed temples and ritual objects at Nojpetén and established a settlement on the island.
The city is also known by its later Spanish name, Tayasal, although Nojpetén is the canonical answer to this question.